Try just being friendly and don't worry too much about having a boyfriend for a while. Have you many female friends, just go out and enjoy their company. Perhaps one of thenm has a nice brother you can practice on, just start by smiling and saying hello, and and look at him when he answers, If people say you are pretty it helps but being interested in people is pretty good too.
Have you thought of an evening class learning a language is good then you will all be struggling to find the right words, and it is just a chance to meet new people in a safe environment. and don't be fooled by how open and cheeky people seem on here , its easy when you hide behind an anonmous user name, I bet a lot of them are quite shy and quiet in the real world too.