When Will He Notice Me

So I'm a freshman in high school. Things are going okay, and I have at least one friend in all of my classes which is a life saver. There's just one problem. I'm
a hardcore fangirl and whenever I like something, I obsess over it. And there's this guy thats two years older than me that I noticed in 8th grade when I went to one of my step-brothers basketball game. I forgot about him over the summer. But what am I to do when I see him again and it turns out he has a girlfriend? (Kay so this is pretty much my high school life, so yeah, sorry if it isn't interesting)