I feel so alone......?

Im stuck in this town finishing college at a school nearby...and I feel like I'm never going to find anyone (good friends or a boyfriend). My "friends" NEVER call me to hang out and whenever I call them they make up an excuse or have better things to do. It makes me feel really alone and resentful. I honestly don't understand why this is happening to me. I'm outgoing and I've been told that I'm fun to be around. But it just seems like everyone is so selfish and caught up in their own lives that I'm left behind with no one. My sister is my best friend in the world and I can only talk to her via phone because she moved halfway across the country for a job. So I'm stuck with my parents and no one else. There's no one I can just hang out with whenever in this town. I don't know what to do..I've never felt so depressed and alone in my life. If you are experiencing something similar or you have any advice for me...please share.