not wanting sex

so i am 18 and the guy i am with doesn’t life here and always wants to have facetime sex ( sex over cameras audio like phone sex but with video) a lot and i just don’t get horny for him anymore. i honestly need to break up with him but he keeps telling me how he only sees himself with me in the future and how he misses when he was here with me and the past memories. i miss them too i wish he was still here but osrt of the fact i’m not happy is because i can’t live. i can’t talk to who i want i can’t go where i want because he thinks i’m talking to someone. i used to do that but i no longer do and he has been the one talking to others. also we don’t date. he wont date me because of distance and says that because he’s so horny that him wanting me even more since we would be together would make him cheat which makes zero sense. i am also in birth control and i’m sure that had taken away som sexual desires but i also have sexual desires towards others and idk what to do.

i really do want to leave him but he was such a good friend and used to be so caring and i don’t want to lose that but i want to enjoy my senior year what should i do.