If you don't go out, you're not going to meet people. I'm told this all the time, so I totally get the obnoxiousness of it, but unfortunately it's the truth. People can't find you if you're "hiding" from them. Don't worry about not being attractive enough, or smart enough. The right person will think you're an Adonis (okay, maybe slightly exaggerating here) and will find your conversations stimulating even if you don't think you have anything interesting to say. So instead of playing games or sleeping at home you should get out there, and if you can, have fun!
So, where to find aspie girls? I can't say for every aspie girl, but the vast majority of my friends are other aspie girls, and I've always been able to spot others of our kind fairly easily. There are more of us out there than you think. Right, where to find them. I'd suggest libraries, especially if there are any events of library type clubs. I was in a club at my local library and probably a third of the group were aspies. (My girlfriends and I were most of that population. xD) I'd also suggest art gatherings, or musical events. Smaller events are more comfortable, so I'd suggest you try those first. A lot of the girl aspies I know are into the arts, music, and things like reading. I know a number who are gamers, but I dunno how many of them hang out in game shops. I've never felt comfortable in game or comic book shops, myself, but as I said I can't speak for more than that. You could also try the local parks or animal sanctuaries. My friends and I used to spend a lot of time in places like that,
Then, of course, there are always the obvious aspie support groups. You can look them up in your area probably online. Usually it's a bunch of parents complaining about their kids, but sometimes there's groups of younger/adult/not parents aspies that go. I go to the one in my area, and there's a number of girls (myself included) who will come on and off. It's probably the most surefire way to meet other aspies. Plus, sometimes there are cute ones.^^
Hopefully that helps.