That's the spirit Mirth! You just have to let it roll of your back...I mean really if somebody turns you down because of something like height is that somebody you really want to spend a lot of time with or even a second more thinking about?
Anyway I agree with what Toaster posted above, you need to get out and just meet people, getting a girlfriend will come in its own time. Don't go into a situation thinking about anything but just making friends, get to know them and just hang out. Not only will you learn social skills, but you'll start feeling better about who you are when you realize these people just like spending time around you because they like who you are. When you get comfortable with who you really are and are okay with it, the doors will open up big time. You'll take your time finding a relationship that works for you, not a crutch or somebody to shoo away the loneliness but somebody you can really fall for.
Best of luck