So there is this guy who I did like and he left on a trip for 9 weeks and he hadn't talked to me but now he started to talk to me. I though I was over him but now that I saw him everything cam rushing back. I don't want to like him what should I do ?

It could be lust...

You stop talking to him -no contact and concentrate on living a life that makes you happy.

Is he nice? Then yes. This usually is what happens. Those emotions just vanish and you forget that he was even part of your memory until his face reappears. Why don't you want to like him?