I feel bad because I'm irritated by my partner's mental health issues.
What about it is bothering you?
I want to talk to him about it but I can't because he is never sober.
Wow, that sounds really hard. It's understandable that you would feel overwhelmed by that. Is your partner getting any professional help?
No, I don't want to force him to get help.
You don't need to force him to get help, but it might be a good idea to suggest that he talk to a professional. I think his problems might be too big for you to help him with, so it makes sense that you're feeling the way you are.