Author's NoteOkay. It is very hard for me to end this. It was easier for my first fic…I don't know why, I usually struggle with endings…but this is VERY difficult for me, so I really need people's opinion on the end. If I get too many negative things, like what I did wrong, then I will definitely fix it! I know that endings are my weak point, so I look to my reviewers for pointers! I don't bite, so make sure you're honest, but please soften it with some compliments. Like what I did right? Heh.

I do hope that I didn't get Derek out of character too much. I figured that he grew attached to Casey, and even developed some of her mannerisms, just from all of the interaction. I know after I get to know someone and know them long enough I start to pick things off them and make them my own. So, that's what I had Derek do. He's still the same old Derek, but…Casey-fied? If anyone notices anything they think should be changed, just let me know. I don't bite:D

DisclaimerYou are the silliest person in the entire universe if you even thought I owned myself. Psh. Like that will ever happen.

Casey walked ahead of Derek, and he wasn't ashamed of looking at her butt. She probably wasn't aware he was looking, but that wasn't really important. He put his hand on her lower back as they reached the top and he softly pushed her to her room. Some how that small touch gave him a sense of dominance.

She walked around him and shut the door behind him. Casey faced him and smiled, and then sat on her bed. Slowly, he sat next to her. Lizzie and Edwin were in the attic room, he could hear them playing a game above them. Nora was downstairs, cooking dinner for the rest of the family. He had no idea where Marti was, and hadn't really given it much thought besides.

"I don't want you to be with anyone other than me. I'm sorry. I just, can't handle that." Casey looked away from him for a moment and turned back to him. "I'm sorry to say that I am so glad you didn't have a good time." Derek smirked.

"Believe it or not. I'm glad I didn't have a good time either." She smiled, and he continued. "Even though she was attractive, very attractive," Casey crossed her arms and looked at the door, "I couldn't stop thinking about you." She looked at him without responding. Her eyes almost had an understanding towards him, and he was slightly taken back. Something felt right at that moment, and he knew that she was the one for him.

"I really do love you Derek. I've never felt that jealous before…And I know that I have been jealous over guys before. I want you so much." She started to tear up and he put his arm around her. I can't believe that I am actually comfortable with her about to cry. I've always felt uncomfortable. Derek gained a new confidence. A confidence that he hadn't had before. The confidence of comforting someone.

"I love you too Casey. I really couldn't stop thinking about how if you were with someone else…I kept imagining what it would be like to see you kissing some other guy…And, I've decided that, I…" Casey looked at him with urgency to his words. What do I decide? I know it, because I feel it…but how do I explain it? This is NOT easy… He looked down and away from Casey, searching for the right words. He never wanted to mess up again, but he didn't want to lose himself in her. The world would be flipped upside down if they took over each other's lives…but he wanted to maintain a friendship in their intimate relationship. Derek wasn't eloquent, so he struggled at explanations. He sighed.

"Is something wrong? What have you decided? It's not bad is it?" She questioned frantically. He took his arm off of her and put a hand on her thigh, telling her to 'calm down'.

His thoughts persisted until he formed what he thought was the best sentence.

"Casey, I love you. I have decided, to keep you…only you…" He hesitated with the final word. After biting his lip for a few seconds, staring at an eager Casey, he recalled the dream that inspired the next word. "Forever." That one word echoed in his mind. It was so final to him, but this time, it was alright. It was alright, because it was Casey.

"Forever?" He nodded his head yes. "Forever…I want you forever too. You make me feel…" She looked up at the ceiling and gave out a small sigh. "You make me feel so…different, you make me feel amazing" She stood up to put more emphasis on her words, "like I could do anything, be anything, have anything…I don't want to give you up. Ever." He smirked, and looked her up and down. Casey smiled innocently and turned away as though she didn't notice.

Derek stood and turned her to face him, and then practically tackled her. She gave out a small struggle then gave into a very sensual kiss.

He heard George get home, and heard his name called. Derek reluctantly broke from the kiss. She followed him down the basement.

George rambled on about Rachel's insanity and the talk with her mom. Rachel had told George that Derek was sleeping with Casey, and they both made a disgusted face, but Derek was smiling to himself inside. George explained that Rachel had proven her insanity before she made the statement, so the statement at that point wasn't viable, let alone likely for that matter. Nora walked in wondering what he was going on about and through the whole explanation she had a look of shock on her face.

Derek successfully snuck away, along with Casey, and they went to Derek's room for some more alone time.

He loved to feel Casey, not because she was a female, not because he was a sex-crazed teen, but because this time…he actually felt something for someone else.

That someone else was Casey. His gut feeling, that never lied, told him it would always be Casey. Forever Casey. Only Casey. Because he only wanted Casey, forever.

/////////////////////////////////////////////////////////Fast-Forward-No-Ones-POV//////////////////////////////

Casey and Derek did eventually tell their parents, but only because Edwin and Lizzie told them. They thought it would be best that they'd know about both relationships at the same time. Casey was the one to make that decision though. Lizzie and Casey became closer over time, and it was Lizzie's advice to finally tell their parents about her and Derek.

Derek and Edwin stayed about as close as they were before, but Casey had finally gotten him to stop taking Ed's money. Edwin was trying to save up for college, and he got a job to help him do so. He couldn't save up on allowance very well could he?

Lizzie became captain of the Hockey team at school and Derek went to most of her games when his college courses permitted. He was trying to become a major league ice hockey player. Casey told him it would be wise if he had a back-up plan, though she believed in his sports-talents, but he didn't listen. He knew he would make it. (And he did.) Sam was a life-long best friend, and thier friendship became better after Casey became Derek's girlfriend. He quit hocky and became a veterinarian. (A job that no one anticipated for him, but almost seemed to suit him.) He accepted Derek's relationship with Casey quickly, because he knew what friendship really was. (Long before Derek ever did.)

Casey became a lawyer like her dad, and helped out the little guy like George. She thought it would be best. Being the girlfriend of a big-shot hockey star wasn't easy. She had to see girls flinging themselves all over Derek, but again and again he reassured her that he wasn't going anywhere.

Nora and George were proud of Casey and Derek. At first they didn't like the idea of their children dating each other, but when they saw how happy they were they knew they couldn't and shouldn't interfere.

Derek won the first big game he had, and to celebrate he bought a ring that he knew would make Casey shine and he proposed to her. She accepted immediately.

They kept their family secret so there wouldn't be stories about their relationship being step-siblings, and that was okay with the rest of the family. Derek always said how he couldn't have done it without the support of his mom and dad, or without Casey. "The love of my life."

This is the end! I really hoped you enjoyed it! I still love reading my reviews, and taking constructive criticism. Don't be afraid to be honest, my feelings won't be hurt if you are just trying to help me fix my mistakes! I am planning to write a one-shot off of this story as requested by beach-luv. It is going to be the proposal Derek makes to Casey. If you are interested, look out for it!