Advice please

Kitten

Okay. So I’ve been dating this guy for a while and everything started out fine. But then things changed and he started to get short with me. And he started to get snappy and angry more often and he keeps blaming it on me but I have no idea what I’m doing wrong. Then we get into arguments and he blames them all on me and I’m the one who ends up apologizing... I am so lost and idk if something else is going on that I’m not seeing or if something is wrong with me...

I really would like some help on how I could bring this up with him. Because every time I try to talk to him about this he gets overly upset... so please help me...