Is it wrong to try to hook up just for the sex?

I'm in my second year of college and I've been single this whole school year. To be honest about things I must say that I've been shot down by a few girls this year, and, there have been others that I was just too shy too approach. So, I am alone and very lonely, and far away from my friends and family. There are girls that I'm pretty sure like me and are attractive but I haven't approached them because I wasn't sure that I wanted to have a commited relationship with them but I'm at the point know, though where I can't stand being alone any longer and am just so desperate --very, very desperate--- So my question is: is it wrong for me to approach a girl with no intention of having a commited relationship with them, when I think that a commitment is what they want? Or do you think I'm thinking too much about it and am basically wasting everybodys time; that I should just try to have fun?