And the next two weeks continued like that. Making plans every evening and spending time together. Spencer Reid couldn't be happier. They went to the park, watched movies, cuddled on his couch, and just enjoyed each other's company.

"I can't believe you just said that!" Caitlin exclaimed as she stood up from the couch, where she had spent the last few hours laying in Spencer's arms.

"Why is it such a big deal?" He asked innocently.

"You can't be serious!"

"I am very serious."

"You've never watched Harry Potter?" She starred at him in shock.

"No I have not."

She continued to stare at him.

"Why is it so hard to believe that your boyfriend has never seen Harry Potter?" He asked grinning, standing up and walking over to her, brushing a piece of hair out of her face.

"Boyfriend?" She questioned, looking up at him. Panic spread through him.

"I just figured, that, um, since, we've been, I mean, you don't have to be-" He rambled nervously, but was silenced when Caitlin put her finger over his mouth.

"No, Spencer. I'd love to be your girlfriend. I just didn't think you thought we were that serious yet." She explained. He instantly relaxed. Caitlin took a step closer, closing the gap between them, and wrapped her arms around his waist, burying her face in his chest. He leaned down and kissed her.

She pulled away smiling. "As your new girlfriend," She said grinning. "I'm going to force you to watch Harry Potter with me!" She told him.

He looked down at her with disbelief. "How happy would it make you?" He asked her.

"Extremely happy. I'd be the happiest girl on the planet." She informed him.

"Alright." He said giving up. In their two weeks together he learned that Caitlin wouldn't give up if she wanted something, and that she'd argue until the end. If she tried to tell you the sky was purple, and you corrected her telling her it was blue, she'd argue with you until she started to convince you that it really was purple.

"You'll do it?" She asked sounding amazed.

"Sure." He said.

"If I could reach, I'd kiss you right now."

Spencer laughed, leaned down, and did the job for her.

"I'll be back in 15 minutes with the movies." She promised him.

"Alright." He kissed her forehead before she turned around and left.

But like all good things, it had to end. A few minutes past after Caitlin left, when Spencer heard his phone ring. He looked at the caller ID. It was JJ.

He flipped open his phone. "Hello?"

"Hey Spence, we have a case. You'll need a to go bag." She informed him.

"Okay." He felt his heart completely sink. He wanted to spend all of his Sunday with Caitlin, not chasing after serial killers.

"We leave in 30 minutes." And with that, JJ hung up.

Spencer signed and put his phone down. He walked into his bedroom so he could change his clothes and pack his bag.

He heard a knock on his apartment door. He swung the door open and was greeted with a strong hug and instant chatter.

"You really are the best Spencer! Nobody ever wants to watch Harry Potter with me." She told him, kicking her shoes off. She looked over at him.

"Why are you dressed like you're going to work?" She asked him, her face falling into a frown. Caitlin didn't want him to leave. She wanted him all to herself.

"Because I am. I got called on a case."

"Oh." She kept her gaze to the floor, and slipped her shoes back on.

"I'll see you when you get back." She was walking out of the door when Spencer grabbed her arm and pulled her back gently.

"I am really sorry." He apologized, the sad look on her face killed him.

"Spencer, it's fine I understand. I really do." She looked up at him and smiled. He leaned down and kissed her for a few long moments.

"I'll see you when I get back." He promised her, causing her to smile.

"Alright. You'll be careful?"

"Of course." He assured her.

She hugged him for what felt like eternity before they had to part ways.

Caitlin really did understand that he had to leave for work, and that he wouldn't be able to keep every promise he made because of it. Her Uncle had been in the BAU, and she remembered him missing holidays, birthdays, and family gatherings due to it. She was alright with the fact he had to leave, though she preferred when he stayed, just as long as he always came back.