Overly irritated partner

So my boyfriend is amazing. I love him very much, he is sweet, supportive and sensitive. We have a really good relationship where we can openly communicate and discuss our feelings, etc.

However, he is so quick to anger and I don’t know how to handle it.

The weird thing is, he’s not quick to anger with me. But anything external can set him off. He makes this angry hissing voice that drives me INSANE. I attempt to not get irritated or sassy back because it makes him feel worse, therefore more aggravated but sometimes I can’t help it.

We are expecting a baby in October. I really do not want our child to learn his habits of anger, like he learned from his father.

Has anyone dealt with this?

I don’t want to make it worse but I want to find ways to comfort him and allow him to comfortably express his frustration.

Again, he has never been violent or hateful towards me. I’m just the one he comes to for support and I need to do better about my responses. But we’re only human🤷🏼‍♀️