please help, im a mess

alright. this guy i was talking to left for college a few hours away. its his senior year so he wants to try to still talk to me. we aren't official or anything. he keeps drinking every night, he always texts me that he misses me and stuff but like never really flirts or says anything else it's like a brief text here and there and ik i shouldn't be complaining cuz like hes still remembering me but i am really hoping im not gonna get hurt. every single hour of every day i spend worrying and stressing, i have huge bags underneath my eyes, i cant even eat. idk how much longer i can handle this. i wish he would just make it official. everything was so perfect when we were close now it's fucked up. i saw him being my first serious relationship and its just not fair. please help me i have no idea what to do in this situation. i posted a rlly pretty snap and he didn't comment on it. and then i said "ur so cute" and his reply was very weird. i get he's prob tired from all the drinking but i am so lost and confused. and i feel like he's going to drop me any second or get tired of me or meet someone else and i'm going to get badly hurt. should i end it before he hurts me? or should i tell him to remember me when he comes back or just leave it alone. idk. help please ):