Alright, so I'm going into high school and I want to forget about boyfriends/girlfriends entirely until I grad?

I realized that I want something more serious with someone who isn't perverted or stoned to hell all the time and I've realized that I'm not going to find that now haha. There's someone I can't get off my mind and have been interested in for the last 4-5 yrs but I know for a fact that he doesn't feel the same way about me, he's moving away, and even if he did like me it's not like he could understand. I've had lots of boyfriends and girlfriends and they've all turned out to be *****. I don't want to do it again. I see everyone else in relationships and it's so tempting, but I know it isn't going to work for me so I'm determined to forget about this at least until I leave high school.. Any tips?