Honestly, kiddo, crossplay is just one of those many hobbies that attracts all sorts. There are going to be some that are gay (such as myself), but there are also going to be so many others that aren't. My best male friend, for example, does drag with me on several occasions as well as crossplays. Yet he identifies as straight and, not only has a lovely girlfriend, but is with a woman who finds the fact that he feels comfortable enough to embrace any sort of femininity to be a real turn-on. Hell, last year for Fanime, they went as Pinkie Pie and Rainbow Dash, and they could barely keep their hands off each other! :P
The point is, it's a hobby that attracts all sorts. Yes, some will be gay. Some will be straight, some will be bisexual or pansexual or even asexual. But at the end of the day, sexuality doesn't even factor into it. It's just something people (regardless of orientation) enjoy doing. If you want to femme it up, femme it up! To hell with your friends' narrow-minded opinions.