Hey, I'm also 20 years old and I just got lower braces (uppers coming next week)

I'm also completly single which is scary at this point, but I guess that if I find a b/f while on braces he'll like me for what I am, not what I look like - which was often the problem before I was braced.
I actually think it's kind of cool to feel "ugly", I guess now I can work out my personality a bit more, try and be a bit more outgoing, more social! And for me braces also bring other good stuff: Like saving money (going out less = spending less) and dedicate my time to study - entered Uni. in 2005.
I guess at this point we have to think only about the good things... We should think about how many people would love to do this treatment and can't afford it. There's people with such messy teeth out there...
But anyways, hang in there and you'll see that you'll be fine!!! Whatever has to happen is going to happen and if u have to meet the man of ur dreams in braces you surely will!
Smile a lot

After you're done no one will resist the smile

Take care and best of luck!
Joanna