How do you get over a crush that won't work because school is over?

Just try not to think about him, its really hard i know, me and my boyfriend were doing good then a couple weeks after school ended he started ignoring me and he wont talk to me at all..i just sent him a message on facebook saying its over and he never even responded, and he still wont talk to me or even tell me why hes ignoring me..im sorry i just kinda gave you a whole story about me but, just try to not think about him, there are a lot of other guys and you just have to find another one. I Know Its hard but you just have to try.