what am i to do..?

i'm not saying he IS, but for the top paragraph; they usually say they can't trust you e.g make you feel guilty and accuse you of things, when they're having an affair, but that's probably unlikely if he hasn't been snooping around.

write him a letter explaining how you feel if you can't actually communicate in person, or threaten to leave him (when in a good mood) if he won't listen to you.
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write him a letter explaining how you feel if you can't actually communicate in person, or threaten to leave him (when in a good mood) if he won't listen to you.

^ i agree fully . If he truely does like you and you say "I really cant put up with his, i might not be able to be with you anymore" he will apologize and change his mood.

So do that