GUYS: why is he acting like this?

He sounds like he is at a point of the relationship that "hit its peek" he my be "getting over you" so to speak, and yes, most of the time its because of another girl. but i don't know him, and you need to just confront him, if you want the relationship to "go on" then you SHOULD tell him how YOU FEEL. Try phone call cus txt you cant get full emotion in ot. you need to hear his voice, and he needs to hear yours!