Something wrong with me

I can't make friends.  I try and I try and it just doesn't happen.  I've lived in Austin for three years now and I can literally count on one hand the number of good friends I have.  Or even just decent friends.  And I have no idea what the problem is.

I desperately want more friends around me, but it seems like no one is interested in being friends with me.  Am I that socially awkward?  I know I'm fairly introverted, but I'm not painfully shy by any means.  I can carry a good conversation, I'm intelligent and witty, and I feel like I'm friendly.  I like to go out, I like to stay in, and I'm laid back enough to generally go with the flow.  So why is it that nobody wants to do anything with me?

Please don't mistake this post as whining.  That is not the objective at all.  I honestly want to know the answers to these questions.  It's Friday night and I'm alone.  Tomorrow night I will go out to a show, where I will know many people, but only one will really be a "friend".  The rest will just be people I know that, if asked and giving the honest truth, wouldn't consider me a friend.  Everyone else will ride there together and laugh and joke together and I will drive by myself.  I asked for a ride and the car was full.  And I couldn't think of another friend in this city to ride with or take with me to the show.  Afterwards, I will drive myself home and then spend the remainder of the weekend alone because there isn't anyone else there.

I'm so tired of being a loner.  This isn't who I want to be anymore.