My boyfriend is 3 1/2 years younger than I am. I'm 22 and he's 19. When we started dating, I was 20 and he was 17. It's only ever felt slightly weird, and only at the beginning of our relationship; honestly it feels like we're the same age. *shrugs*

Not only that, but basically all the guys (with one exception) that I've ever had serious crushes on have been at least a year younger than me, and all my close friends are considerably younger than me as well.

It works out though, since I both act younger than I really am, and look younger than I really am (most people, when asked to guess my age, guess 16-17.)