Thornton, I feel the same way about my anger. Everyone tells me to "get angry" and I try (it only seems to come out in the shower for some reason lol). But otherwise, I can't so you're in good company. You're doing well though Thor and keep focusing on the only thing in this you can control - you. You've got this.
Anger isn't a bad thing. It is a normal emotion, and suppressing it, is the same as suppressing any emotion...
It is going to have to come out of you, before this is over, the same as it is going to have to come out of your spouse, before this is over.
It is how you choose to deal with it, that makes the difference...
A very wise man once told me... Use your anger as a shield, not as a sword...