need some advice 😭

okay so I put up a post a few days ago about breaking up with my boyfriend. we came to an arrangement that we would still kiss and do everything else that we did when we were together but we're only best friends. I need some advice on how to go about this. I can't eat, I can't sleep and when I do I cry myself to sleep. the only reason I agreed was because I was almost with him for a year and I can't let him go. his reason for leaving me was the he needs to sort his problems out before he can give his life to anyone. his mum is an alchoholic and we will get back together when she stood drinking but she won't. she told him that herself.