Dating On Wheels: 20 year old can’t catch a break

Dear Tiffiny,

I’m a 20 year old guy with Friedrich’s Ataxia, a very rare genetic disorder, similar to Muscular Dystrophy. I’ve been in a wheelchair since age 14, and have never dated. Not that I haven’t tried. 

I’ve asked girls out and have tried loads of dating sites, but with no luck. Girls I ask out say no, and girls on dating sites rarely respond. Friends (who do happen to be girls, but aren’t my “girlfriends”) have said I’m handsome, so I don’t think I’m rejected because I’m ugly.

I’ve felt depressed at times, because I’m never able to attract the right type of girl. Any advice?