I'm going to miss him so much...

My "summer bf" is leaving and I would pour my heart out, but last night we was talking and I guess he was just trying to be funny or whatever and he was like "girl you don't know what love is" but I really honestly like him so much. We have spent everyday of summer together & I loved it. It hurts for me to see him go, he gets mad when I call him, "friend" instead he says "I'm your boyfriends" but how can you put an expiration date on a relationship, since the beginning because you knew you were leaving. He always says "I really really like you and you know I'll never forget you, do you think we would be together if I lived here(stays 4 hours away) I'm just so sad and don't know what to do.