Well, like any sport, it makes you an athlete. Most girls think athletes are hot! It might just give her a sense that you should be dating another athlete, or cheerleader, and so on. That might be why she is feeling out of your league. Its your job though to make sure she knows that you love her, and she's on the same league as you ;).
idk but cherish it! make her feel a little lower but not entirely. if you make her feel too low she will dump you, but if you treat her little bad she will get desperate for you, making her do whatever you please. not trying to sound like an asshole but thats always been the guys code
She's probably thinking that sense your into hockey that you'll become so popular and famous that everybody's gonna like you especially the hot and pretty cheerleaders maybe that's why or maybe she just doesn't like hockey in general if you really care about what she thinks than you should just find another sport that she's into or something else or not even care at all 10 leagues in a row and everybody loves you and the cheerleaders wanna be all over you (What I really mean by cheerleaders is the girls in the audience not like football or the cross cheerleaders or anything like that.