That would be very shallow and I would never turn down a girl just because of braces or something similar. It's just stupid. If she's a nice girl, nice personality, I like her, then so what if she has braces. It's not like they're going to be there forever.
Hey, I know how you feel, I'm 18 and in college- got braces around seven months ago and was scared what guys would think of me. It takes a little while but you'll get used to them, I actually don't want mine off,cant imagine being without them! I was scared too like I said,because I was getting them quite late and that guys wouldn't be interested or think I look stupid but for some reason since I got them on, more guys seem to like me. I get compliments about them all the time that theyre cute etc. Don't worry about it, theyll be fine :)