Lexie hadn't seen Mark since she'd rushed past him out of the locker room three days ago—not even in passing in the halls. She knew she should feel grateful, but she also longed for a glimpse of his ocean blue eyes that once swallowed her whole. Her stomach was a fiery pit of anger and longing. As much as she hated him, she loved him. None of her feelings for him had faded and she knew his hadn't either.

Lexie shoved her things into her cubby and pulled on her lab coat. She was stuck with a night shift in the E.R. and she had barely been sleeping lately. All she could do was pray for a slow night—she wasn't sure she had it in her to handle anything else right now.

Meredith was running the E.R. tonight—thank god. Maybe she would be able to distract Lexie for a while. Things seemed quiet enough for now. They were just getting into chief resident talk when the phone rang.

"Seattle Grace Mercy West emergency room." Meredith answered, "Alright, got it." She hung the phone up. "Tyler, can we page Robbins and Sloan? We've got an incoming burn—15 years old. Lexie, grab a gown and head outside, you're on this one"

That was the last thing Lexie wanted to hear right now. "Please, Mer. Can't you get someone else? I don't think I can be in a room with both of them."

"Sorry, Lexie, but you're the only one I've got available right now."

Mark and Arizona ran out to meet the ambulance with Lexie. They got the kid into a trauma room and began assessing. It didn't look too bad, Mark only found some second degree burns on the legs; other than that, the kid was doing well. It would take a couple of hours, but it would be an easier case.

As the patient was brought upstairs to be admitted, Lexie pulled off her gown and decided to go grab a quick nap. She found the closest on-call room and flopped onto a bed. Suddenly, she heard the sudden jerk of the door handle and looked up to see Mark in the doorway. Lexie snapped into a sitting position on the bed. He shut the door behind him.

"What are you doing?" She asked Mark.

"It's so hard to be without you, but so hard to be around you, Lex. It was killing me trying not to look at you in there. I miss you."

Lexie stood up, but kept her distance from Mark. "How do you expect me to move on when you keep doing this to me?" She asked him.

"I don't want you to move on, that's the thing."

"Well, you're moving on without me, Mark. Don't you think it's only fair that you let me move on too?" Her voice was layered in annoyance and accusation.

"I'm not moving on without you. I want you to be a part of this! I want to work this out with you!" He shouted at her.

"How are we going to do that Mark? Do you just expect me to stand on the sidelines and watch you living this huge part of your life that doesn't involve me? I don't think I can handle that!" She shouted right back at him.

"I want you to marry me! That's what I want! I want you to be a mother to my child, I want you to be my wife."

"Mark…" Lexie sighed. Before she could even begin to think of a response, his lips smothered hers. She couldn't help but melt into them with every part of her body. She pulled back but his hands didn't leave her body, "Mark, we can't do this."

"Why not?"

"Because we broke up. Because it won't help either of us move on." Lexie tried to argue.

"I just asked you to marry me; there is no moving on." He countered.

"Answer me one question, Mark. If you loved me so much, why couldn't you wait to have a baby with me? Start a family with me?"

"Lexie, I didn't mean for this to happen the way it did…"

"But it did. So, there's no changing it now."

"I'm still in love with you. Nothing needs to change… We just need to be together. This is almost everything I have ever wanted in my life, Lexie. It isn't everything if I don't have you too."

"I am still so painfully in love with you too, but I can't do this. I know you'll just break my heart."

Mark looked at her with an expression of hurt, "The last thing I want to do is break your heart, Lexie."

"Well, you've done it twice before." She looked at his sad eyes before she left. Once again, leaving Mark in an empty room.