To be fair, how about be honest, and when you're feeling calm, explain (or email) H that right now, this past week or so, you've been rehashing hard feelings about the A, and it's why you're crabby. Tell him it's something you have to work through and might need to talk to him about it as well? Sounds like you're at that stage, or maybe already have been.
Just be open with what you're going through, like you are here...and he can be prepared to be more patient.
