What do I do? btw this gonna be long

so me and my off and on boyfriend are distance. im 16 now he about to be 19. we been off and on since i was 14 he was 17. um he is in the military and im still here where we met. still attending school and being a teenager. btw when i was 15 i got pregnant with his child before he left. he never knew. i was excited to tell him when he got back from basic training but i ended up losing the baby. i didnt tell him until last month so like a whole year later. he was upset that i told him a year later but not anymore. anyways um last night he called me at 1 am and he was drunk at a party and he said some disturbing things. he said things like “im happy you lost the baby” “im so fucking drunk rn” “im fucking bitches” and he doesn’t remember any of it. i sent him screenshots this morning of the calls and he doesn’t remember. he called me multiple times. and i told him and he was like i wouldnt say anything like that to you. and he is hungover and he is still trying to argue with me about it. he said he asked his friends if they remember us on the phone while he was at the party and they said no. im thinking duh they don’t remember they was drunk too. and he was showing me a girl all on him in the camera. but im thinkn i cant be upset bc rn we not even together we supposed to “friends” at the moment. and im talking to other dudes. so i cant get upset ig. but what do i do. how do i deal with him when he is drunk. do i wait it out. do i argue back. im so confused. and do i get mad that he is out and getting drunk with his friends or no.