If you're stong enough to go and "act as if" (and you are if you choose to be). Go, if you want to. Do not go if you think you'll be a wet towel. That will just give justification to your H.
I know it's hard and hard to know what to do. You are stronger than you think though. Your going will not change his mind. It will give you the opportunity to show you can be included in "family" things without being a drag, which may get you more invitations than you'd otherwise get.
