How can I get out of this heartbreaking loop?

Well ever since I was a kid I was a total tomboy. Loved sports, getting dirty, burping, making stupid jokes, and acting like an ***. But I still maintained a cute girly appearance. Then when I was about 10 I was d by an older guy whom I thought was a friend. Ever since then I gained weight, started dressing frumpy, and did pretty much everything and anything to seem less attractive so it wouldn't happen again. So I became one of the guys. Just with . So nowadays, I lost some weight and still going, dressing better for my figure, and started using makeup etc. But still the same always happens. I meet a guy, fall head over heels, but they continuously only see me as one of the guys. I'm 20 and have yet to have a boyfriend and I still don't see myself having for awhile. I just feel so empty and alone. Everyone tells me I'm cute, and I know I am even with the extra weight. I have good self esteem but a broken heart. I have so much to give and nothing to recieve. Help