Search Results: shy when it comes to approaching guys

I'm really shy and stare at the ground a lot. Sometimes I walk into things, and, occasionally, almost into people. I find it difficult to make eye contact, but I do when people are talking to me. I try very hard to be polite and respectful. I have a soft, musical voice that sounds odd and high-pitched when I'm nervous or angry. Sometimes, my accent comes out country. (I usually affect a more upper-class "preppy" Southern accent.) This embarrasses me so much because I also have a crooked tooth I can't afford to fix right now, and most of the people I'm around have a bit "preppier" history.
When guys approach me, I don't know what to say, and sometimes I giggle nervously or keep too straight of a facial expression when I talk to them. Usually, they get either that distinctive "rejected" look or look confused after talking to me. Some guys brazenly check me out frequently over a period of time but then never try to talk to me. I know that I should be more encouraging, but, whenever a guy seems to like me and I like him, I get so anxious I can't think strait.
I think this is what keeps me from dating, but I'm also worried that I'm just too weird and awkward in general. I have Aspergers but am very high-functioning, and I don't think anyone would guess it. It does, however, make socializing much more difficult, and (I don't mean to brag about this. It really is a problem.) I have an uncommonly high IQ (157) which also is supposed to make socializing more difficult.
I also tend to come across as sweet, and my family, at least, enjoys my company. I'm almost everyone's favorite sister, daughter, granddaughter, cousin.
For reference, as much as looks are relevant, this is my picture, and I'm decently fit, naturally curvy, and not overweight.
Is there any hope for me, and what should I do?
(Bye the way, thanks to anyone who read this or responded or especially both.)