Why is he doing this hep?

I dated a guy with the reputation of a player for over a year and loved him,he slept with my cousin,then left me all weekend and i found out he spent it with this girl,i mailed her and she siad they were just old mates having a catch up..butshe is now on his facebook commenting and he won't tak to me anymore even tthough i text him,but i can see he is still checking me out online...what does this mean?