So my boyfriend lost his mom...

Erika
About a month ago, my SO lost his mother. They were extremely close and it changed both of our lives. Since she passed, I have been trying to be the most patient, loving, and understanding girlfriend that I can possibly be. However, we still have gotten into arguments and now I feel like I have to walk on eggshells and watch what I say all the time. He's very angry and I try my best to make him feel loved, but it's never enough. We recently broke up because he says that I'm just too much to deal with right now and it sucks but I nothing has really changed between us. We still hangout all the time, still have sex, and still claim each other. I'm just afraid that one day all these things will stop and I'll have to really move on, but he's truly my best friend and I don't wanna lose him. I think he's just confused but I don't wanna pressure him either. But I too have been effected by the passing of his mom and just watching him be so depressed with no way to help him kills me inside...what to do?