Help me!

Well I’m talking to this guy for a year, a week ago I saw him with my half girl cousin they was hanging out and riding rides at the fair therefore he wasn’t even talking to me at all at the fair . Some people say they are cousins because of their grandpa but to be honest I don’t think they are cousins, and then someone else told me that the boy who I am talking to just want a quick nut.... my girl cousin is a ho to be honest and I told her I like him before all this happened . Another thing is that he haven’t text me for days but now he texting me randomly to hit me up.

Should I not talk to him no more or should I still?