Timing is everything, and that's never more applicable than in a romantic situation. Luckily, you've got great timing right now, so if you have been waiting to work up the nerve to ask someone out, you'll suddenly start to feel a lot braver about the idea! You should take a philosophical view of the proposition and not worry so much whether they accept your invitation or not. It's sort of beside the point, isn't it? Just the act of being so vulnerable is a big enough victory, regardless.