in sort of the same situation except im a sophomore in college, ive been working on it lately, and really what it comes down to is just manning up and talking to people you dont know. The more you do it the more comfortable you will feel around people you dont know, and the better you will get at making friends. Sounds simple, but i know its pretty overwhelming at least for me. Just gotta realize that even if they dont like you, theyre missing out not you.