A/N: Hello all! This is my first Doctor Who fanfic! This is a Doctor 10/Rose fic, and is written in response to Doomsday. Set three years into the future (so I guess it'd be AU) . Hope you enjoy!

Disclaimer: Doctor Who is not mine. This story is not being written for profit.

Chapter 1: Three Years

Three years. It had been three long, hard, depressing years since he had seen her. Three years since that beautiful face, glowing and delicate, had been tearstained while those full, soft lips had told him that she loved him.

And it killed him.

He tried to say it back, wanted to say it to her for months, but he ran out of time. And he cried. A Timelord, who wasn't supposed to cry, to feel strongly about anyone, had broken down and cried over his lost love.

Yes, love. He had fallen in love with her; her smile, her laugh, her determination, her naive outlook on life, her wit, her eyes, her passion, the look of amazement on her face when they went somewhere new, and the look of joy on her face when he agreed to go back to her mum in order to visit her. He loved her concern for him, how she would worry and do everything she could in order to save him, the look of relief and happiness on her face as he came back alive, and the feel of her arms hugging him tightly, conveying how much she loved him. He also loved her bravery, how she would go anywhere with him and no matter how dangerous or dire the situation; she'd never loose her cool and would fight with all her might to try and escape.

He tried to move on. He took on another companion, Martha, and traveled through time, trying to forget Rose and show Martha the wonders of time and space. He lasted four days. They were going somewhere new and she said something that reminded him of Rose. It wasn't what she said per say, but the way she said it, with enthusiasm and joy, that brought back memories of Rose and how she would always be enthusiastic about new adventures. He cried, just broke down and cried. Huge, heart wrenching sobs escaped him as he covered his face with his hands and let the tears stream down his face. Martha, startled, tried to ask him what was wrong, but he ran from her and into his room, where he curled up into a ball and continued to cry.

Martha, extremely confused and concerned, started to wonder what had made him break down like that. She hadn't known him that long, but got the impression that he wasn't the type to cry. The TARDIS explained to her about Rose, Torchwood, and the goodbye between the Doctor and his Rose. Martha, understanding, decided to help the Doctor find a way back to Rose.

After recovering from his "episode", the Doctor went back out to find Martha, knowing he'd have to explain to her what happened. But as he found her and started to open his mouth, she looked at him, and he understood from her gaze that he would never need to explain himself because she would never ask any questions. After that, whenever they went somewhere, they looked for information and technology that would help him get back to the other reality.

They traveled together for a year, before she decided to leave. She could tell he was feeling guilty about obsessing over Rose and not focusing on her or showing her a good time, so she left. She did find him a new companion, David, and explained to him about the Doctor and Rose, what they had found, and why she was leaving. David understood and promised to help the Doctor.

And so it went for two more years; the doctor traveled, and with each new companion he tried to focus more on them and less on Rose, but he never really succeeded. He went through 4 more companions after David: Christine, Jonathon, Peter, and Jamie. Each one was told by their predecessor what was going on, and each promised to further the investigation. They looked into wormholes, supernovas, solar flares, and even black holes, searching for a way to return back to the other reality without collapsing two universes. When Jamie finally found the answer, she left a note for the Doctor, (explaining her findings, the work of everyone, and finally wishing him luck), and left. When the Doctor returned, (he had gone off in search of information real quick), he found the note and smiled as tears of joy ran down his face.

He searched for two weeks to find the right wormhole, and once found (right next to a super nova) he traveled through it. At the other end he came upon his goal; the other Earth. He checked to find out how much time he had to find her and convince her to come back with him.

Two hours.

After three years of searching, he only had two hours to make his plan work.

"I always have loved a challenge."

A/N 2: So how do you like? Review please, cuz it makes the chapters go up faster!