A/N: Firstly…this story originally was Lola's (lolaweasleyakahorrorgirl714) fault…then Cheri (cheri1) gave me a storyline, and I started writing! So credit foes to Cheri was the idea!! Doctor Who and Harry Potter cross over! hehe!! please R&R:

Chapter 1:

'I…I…I love you' Rose struggled with the words, knowing it was the last time she would be able to tell the Doctor.

'Quite right too. And I suppose if it's my last chance to say it' The Doctor was hoping he would be able to finish this sentence. He could talk all day, but something this important was harder, but seeing the broken look on Rose's face he really wanted to say it, needed to say it. He needed to give her something, as he said goodbye. 'Rose Tyler…'

He didn't get to finish the sentence. 3 words. All he had left to say was three words. But his image faded from Rose there at the beach. He was never going to see her again. He was never going to see her again, and he hadn't got the chance to tell her how he felt. Three simple words that meant EVERYTHING. I love you. Why he wondered, did I waste time saying 'quite right too'. She had time to say it, why didn't I. 'It's not fair' He screamed into the nothing of the TARDIS.

The TARDIS hadn't never seemed so big, so lonely…No actually it had, once before, a long time ago before he meant Rose. Back when Gallifrey burnt. Back when he hadn't nothing and no-one. And here he was again with nothing and no-one. He hadn't let anyone in for so long after the Time War, and then there was Rose. He had to let her in, so was so special, and he ended up falling in love, and he lost her…

…Just like he's lost everything he ever cared about. Everyone he ever cared about. What was left now? Going on like normal, forget Rose? No way. He could never forget Rose. And there was no way he could go on like normal. He didn't want to go on alone, and he didn't want anyone who wasn't Rose…He couldn't win. He either had to find someone else, or stay alone. But if he had someone else, he would just keep seeing Rose whenever he looked at them. And if he stayed alone, he'd be soo lonely. So lonely.

Gallifrey burnt. So many people died. Billions. All the Time Lords, and many other creatures. Many other planets. The universe is just full of death. Nothing but death, and destruction. Pain, and loss. Heartbreak. A third option!! There was a third option!

Long ago the Dark Lord had call on the Doctor to join him, but the Doctor had vowed that he never would. He would never join him. He would never live a life causing death and destruction. He would never live a life without love, and care. But now it seemed the perfect option. He had lost everything, everyone he ever cared about. Ever loved. But if he didn't care about anyone, if he didn't love anyone, he couldn't lose anyone. He'd be ok, with a black heart. If he let all the pain and hurt turn to anger.

'It's perfect' The Doctor said, laughing evilly. What did it matter if he was the one causing the deaths rather than trying to stop them. They would happen without him. The little people, humans, be they muggles, or witches or wizards, they would still loss the people they love with or without him. He might as well help along in the losing. And it would serve them right for loving. They would have to learn to live without love. Love only destroys people. If shouldn't take them too long to realise, it only took him 900 years.