Moody bf

My boyfriend gets crazy moody. It used to be really bad to the point where he'd start pointless fights like 2-3 times a week, now it got a bit better but we still fight once every week or two and its over nothing?? Our last fight was about me apparently cheating when he knows damn well what I'm doing and where I am and even though I was tried to reassure him that I'm not seeing someone else he still got mad? It irritates the crap out of me cause he acts so immature like he's bored so he just starts a fight for fun and then also we can't just talk things through cause he just cuts me off and says shit like "I'm going" "I don't wanna talk" like man you just had a problem why don't you wanna talk about it???idk what to think of it but it's seriously starting to really get to me😩 EDIT we argue and then this is what he does to me: tells me things like how he feels shit and he can't cope so I start feeling sorry for him and feel bad if I don't reply or if I'm a bitch