He should have known it would be like this.
Rolling onto his side, the Doctor couldn't help but smile. Just like he couldn't help running his hand through the blonde hair that gleamed in the moonlight. Or melting like a schoolboy with his first crush at the realization that she was here. In his arms. In his bed. And she wasn't going anywhere for a good, long time.
He didn't do domestic. He'd always hated having companions with family, friends, boyfriends. The pressures. The responsibilities. The guilt. The nagging. The whining. It was enough to make you mad.
So he was surprised to realize he liked knowing that Rose was puttering around in his kitchen. That, if he asked, she'd set up tea for two, and they could take it to the library and drink and nibble and talk about whatever came to mind. He was even more surprised to realize that he liked knowing she'd fuss at him if he was late getting back to the TARDIS. And that he liked seeing her things strewn all over his formerly neat control room.
He was even starting to enjoy their regular visits back to see Jackie and Mickey. Considering how crazy Jackie made him…well. Only a man in love would enjoy spending quality time with Jackie Tyler.
She'd never been ordinary, his Rose. He was ashamed to say that in many ways, his companions barely blipped on his radar. Oh, he enjoyed their company. Kept them safe. Listened to them talk. And when the time came, he told them goodbye and moved on. He missed them, but he kept moving on. He was the Doctor, after all. That's all he'd ever been, until she came along. With her blonde hair and her fiendish devotion to chips, tearing away all of the arrogance to get to the man underneath. The man he suspected no one ever saw but her.
If Rose ever told him she wanted to move on…he didn't know what he'd do, but he suspected it involved sonic-ing her inside the TARDIS until she changed her mind. She'd started filling his head with crazy ideas. Ideas like waking up to her smiling face every morning. Ideas like spending his days curled up with her on the couch in the library instead of out saving the world. Ideas like little bouncing blonde heads running through the TARDIS, getting into mischief.
Gallifreyan children. How long had it been since he thought of them? No, he realized with a smile, pushing down the pain. Not Gallifreyan children. They'd died in the Time War. They'd create something new, he and Rose. A new species. Part Gallifreyan, part human, hopefully with the best parts of both of them.
Crazy ideas. He didn't do domestic. Didn't have a nine to five. Didn't want a family to support. Responsibilities tying him down. People counting on him, not just to pull them out of a pinch, but to be there. Day in and day out. For the rest of his very, very long life.
Domestic. He didn't do that. Except with Rose. Smiling down at his own sleeping beauty, he pressed a quick kiss to the top of her head, ignoring the way his blood stirred when her lips tilted up and she snuggled in a little closer. He didn't want domestic. Except with Rose. In which case, he was very afraid he did.