Sometimes you look at her while she's not looking at you and you feel both of your hearts skip a beat from just an expression on her face. She'll be doing something completely ordinary or silly, like crying while she reads the seventh Harry Potter book or trying to lick peanut butter off her nose, and you'll just silently gasp and stare in awe.
Because it shouldn't even be possible for a girl so inexplicably human to make you feel like this. Peroxide-blonde hair and doe-eyes shouldn't hold this power over you. You're a Time Lord, for heaven's sake, and this is ridiculous.
But then she'll catch you watching her and smile this heart-stopping smile that has you automatically grinning back, and you'll forget everything you were just thinking. Who cares why, or how, when she looks at you like that? Like you hung the moon and the stars.
No, you didn't hang them, you just took her to them. And you'll gladly continue it if she continues to giggle at your expression, just like that, and gets up to come snuggle into your side, like that.
Yes, she's only human, but when it comes down to it, you're only a man, and a horribly besotted one at that.