This is a Lexzie fic. There's a major twist here: Denny didn't die and him and Izzie are still engaged. This takes place when Denny just got his new heart.

The love of his ex girlfriend's life finally got a heart. There was a little piece of him that was happy for both Denny and Izzie. But most of him raged with anger and disappointment. He was still not over the fact that Izzie dumped him for a half dead corpse. As he watched through the window looking at how happily they both seem, Alex Karev finally let go of all his anger towards the "happy" couple. He waited for Izzie to leave the room so he could have a chance to talk to Denny. As she did so, he approached his room nervously.

"Hey", Alex said half-heartedly. Denny was surprised to hear him talking to him let alone see him in his room.

"Dr. Karev", he nodded his head as a sign of understanding.

Alex grabbed his chart and pretended to look over on how well he was doing.

"How you feeling Denny?"

"Uhhh… just great" he replied unsurely.

Alex nodded his head back and smiled up at him.

"Look, Alex. I never really got the chance to thank you. For giving me this heart and all. So I just wanted to say… thank you"

Alex stared at him and came up with a reply. "Yeah, well, it's my job to save lives. I would've done it if you were any other patient in here".

"Right", he replied in hesitation.

Alex sighed. "Look, I just came here to… apologize. For everything that I've done wrong to you and to Izzie… I'm sorry. I was jealous. Of you. And I was jealous at the fact that Izzie dumped me for you. Look, I'm sure you're a great guy and (sighs)… just don't hurt her. I know I have a lot of times. But you don't look like a guy that would hurt her on purpose. Not that I ever did. Izzie's…. she's a great girl. She's everything a guy could ever ask for. And I just want you to tell me that you won't ever hurt her the way I did. And… take good care of her."

Denny smiled at him. "She is a great girl. And I'll take care of her".

Alex breathed a sigh of relief and left the room.

Little had Alex known that Izzie was there the whole time he was talking to Denny.