Love ): help pleaseee!!!?

okay so last summer i got with this guy ive known scense i was younger. it ended up to where we fell in love with eachother over 2 weeks, like crazily in love! sounds dumb. but i cant help how i feel. unfortunantley we were both in relationships. and as wrong as i know it was. we were both gonna break up with our current relationships. mine being a year, and his 4 :/ so it was hard for him. only i followed through ;( i still am crazy about this kid and i know he still wants me i see him at school everyday and we always give eachother that look.. ya know? but i cant have him. it sucks cause i want him soooooo bad. i even beat the **** out of his girlfriend and gave her a concusion.. messed up i kno. i sound like some phsyco ***. but anyways i have this new guy i have been seeing im hoping ill eventually get over this other guy.but when im with my boyfriend i only can think about him its been 9 months and im not over him :( should i stay with my boyfriend and just give it more time?... or break up with him?