I'm a 17 year old male high school student,and I have never had a girlfriend. I'm in my junior year, and I feel like i'm missing that true high school experience. I always seem to be put into that friend catagory, and im always trying to change my appearance to look better than I already do. This one girl i'm interested in is really cute, but we have been friends for about two years now. I try to flirt with her doing class, but it doesn't help that her ex sits right next to me,and is always trying to get her attention. She knows I like her, but I don't know if she's taking me seriously. She says she doesn't like her ex anymore, but she gives him more attention than she does to me.

Some advice please?