Dealing with a Boyfriend's Toothache and Anger

My boyfriend has a really bad tooth ache that has been going on for a while. It’s been the worst the last three days. I’ve been trying my best to take care of him but when it’s really bad he lashes out at me to go away or shut up or get off of him all I can do is just sit there then when it subsides he sobs and apologizes meanwhile I’m sobbing because I’m just watching him in pain and he’s yelling and it starts all over the next day he was a little better I tried to talk to him about how he was acting towards me he says he keeps apologizing and what else do I want from him and I say I just want him to acknowledge it’s not okay to act that way when I’m just trying to help and then he says I don’t understand because he was in so much pain and I do understand I just don’t think it’s an excuse I don’t know he’s always so angry and he says I’m too sensitive because he’s never mad AT me but he gets upset when how he acts upsets me wether it’s directed at me or not I tell him it’s concerning when he gets mad and yells and hits things but he’s never raised a hand to me and he says that if I’m afraid that he’s going to hit me I should just break up with him I don’t know what to do