How to stop caring about someone that keeps hurting you?

looooong story short: a guy i've kinda been hooking up with on and off is back in my life... He stopped talking to me and i stopped talking to him for a while because of all his *** hole moves... but shame on me ... I let him back in my life when he tried and made up some bullshit lie as to why he aacted the way he did last.. we hung out twiece and everything was fine in person .. he's very fun to hang out with buttt he didin't try conctacting me again after we did hang out and i asked him to hang out last night.. he literally blew me off... I JUST WANNA GET OVER HIM he keeps hurtin gme for no reason.. not to sound concetied but I know im better looking than him and deserve someone nicer because i have a big heart but I just can't stop OBSESSING over him... I always look at his fb and etc...grrrr anyyyy suggestions would help