IMO, You are 100% right... Let it out. Feel the anger. Shout it out on this forum. Bad mouth your H. Whatever you do, do NOT bottle it up, it will eat you alive.
Ironic story... I blast my W on here. And then I cry. I say nice things about W on here, and then I cry. I want her to die a slow painful death sometimes. I want her to come crawling back so I can spit in her face some days. To feel this is human.
Now what would I do if she did come crawling back? Oh boy, I don't honestly know! I might, out of weakness, take her back? I know that venting my hate has helped get rid of it, so maybe I can get by without taking it out on her later?
My twisted goal... To make such a wonderful life for myself that she'll feel like a fool for having left me. Others on here won't agree. That's ok, if it leads me to happiness, does it matter how I get there? W will never know how I got there.