What should i do about my guy friend that i like?

He use to live by me and talk to me in summer alot and he hasnt talk to me in a month or more.He has his own place never told me he moved knowin I'am a friend well i thought i was .His mom lives by me his lil cousion talks to me but juss tells be bad things about him.Im upset cuz he bragged to his cous of are makingout session .He never messsages me notin so should i care or not?