I just have to type this out somewhere and this seemed like the best place. I live with my fiance, and I have a tendency to get extremely irritable at times due to my anxiety. He tends to take it personally and think that I'm upset with something he did.

I've tried explaining that I don't understand myself why I'm irritable all of a sudden, so I can't explain it to him either. I just get overloaded somehow and then I get grouchy. 

When that happens, I get quiet and snippy and just want to be left alone. Unfortunately, he takes it so personally, like it's his fault, and he doesn't understand why I can't just explain what I'm upset about. So he goes off and pouts... Which if you can't tell, obviously makes me more upset because it feels to me like he only wants to help me how he wants to help me, not give me what I actually need - space without judgment. 

Instead, he tells me that my mood affects his mood, which I don't think is fair. I don't hold him responsible for my emotions and I don't think he should hold me responsible for his. Especially when I've already told him that I'm just feeling anxious and it has nothing to do with him. He just can't get over trying to understand, and I get so frustrated trying to explain something I don't even understand. 

Any advice on how to help him understand? Or any (short, he's not a reader) articles or resources he could read to have a better understanding? I'm just at a loss with this.