my emotions

so me and this guy were talking i guess, he says we were dating but that's not the point. anyways we were talking and out of nowhere he ended things, didn't give an explanation or anything. this happened a month ago and I still cry about it. he means the world to me and I would do anything for this guy. I see him almost everyday because I give him rides and stuff, but I just hurt so much missing him and I don't know what to do about it.