Don't know what to do

My fiance and I have been together for 8 years this August. We have a 5 month old baby girl together. Recently he's gotten almost abusive. Not physically, but verbally. The smallest thing sets him off. I'm writing this as I sit on the couch after he stormed off with our daughter because I asked him to change her diaper. He had her for 30+ minutes while I cooked us lunch and didn't change it. It was soaking wet, so I asked him to change it because he should have when she woke up and I was making us lunch. He was yelling at me and then pushed past me while telling me to "get the fuck out of the way" and mumbling crap on his way. He never wants to take responsibility, he adores her but never wants to give me the chance to do anything and I have to tell him when to feed her, put her to sleep, change her, she doesn't want to sit that way, she's crying because of this, etc. It's just that now he gets mad at me for every little thing. Like loses his shit. The smallest things piss him off and he'll ignore me all day if I say or ask him to do something. He spends most of his time off doing whatever in the house instead of spending the time with our daughter and I. He makes me feel guilty for asking him to watch her for a little bit. I don't know what to do anymore. I'm ready to give him the ring back until he starts to treat me better. He was never like this until recently.