No worries, man. I know a lot of people who have messed up, especially while attending an university. (Myself included.) You just have to try to get your life back on track, know what's important to you, and pursue it.
I went to university and dormed. All I did was wander around and go on the computer. The whole time I was thinking about the girl and worrying about what she was doing during her freshman year. My mom realized this and ordered that I drop out ( I wasn't going to class). I still think about her every day. Story of my life.