Why Is It Always Up To Me?

I've come to realize that the relationships that I have been in and still in, which aren't that many, are the one's I have started.  This is my third year in college now and I 've made only a handful of friends.
Why is it all up to me to talk to people and make friends?  How come no one ever starts conversations with me?  Do I give off some kind of evil aura or something? I don't have body odor or anything.  It can't be my personality because people can't know that beforehand.    I don't know what it is that makes people not talk to me.  I really wish I knew so I could change it.  I just wish the people start conversations once and awhile and get to know the true me; not the quiet guy that sits in the back.