Why do you want to stay with hubs? Do you feel comfortable sharing that? Because from what you've said, I'm not seeing any good sides to him.
Admittedly, you came here partly to vent, so this isn't necessarily the place where you're going to talk about his good aspects. But from what you've said:
- you can't get him to do anything other than watch TV with you. No dog walking, no hiking, no doing stuff together, just TV, despite this being something you've talked to him about for years.
- he wanted to open your relationship for HIS benefit, not yours. He assumed that he'd be dating men, and you wouldn't have any success meeting people.
- his thought processes are such that sleeping with another women would be "evening" things between you...let me tell you, nothing makes ME want to sleep with a man more than knowing it's to "even things up" between him and someone else. Are you aware of how deeply, and hideously objectifying that is?
Let's just take a moment with that one - because if ever there was a shitty, demeaning, ridiculous fucking thing to say, it would be that sleeping with a women is "getting even" with you.
That's not even taking into account the part where that seems to be WILDLY different from his original reason for wanting to be poly, which was to explore his bisexuality. I guess getting even with you is more important.
(I'm going to let that go now, because I could froth at the mouth over it for hours)
- And lastly, by texting with Lover, you "ruined his evening". You didn't ruin anything. Texting a particular person does NOT ruin an evening. Your Hubs does not have the right to pretend that you have that kind of power over him; it's actually a backwards form of control: by telling you that YOU ruined HIS evening with YOUR behavior, it sounds like YOU have the power and YOU are the person behaving badly. But actually, this setup allows HIM to control YOUR behavior, by demanding that YOU cease to do certain things, because of his claims that they are hurting HIM. Make sense?
All around, it sounds like a bad dynamic on his end.
So I ask again: Why do you want to stay with this guy? With the added question of what do YOU want out of YOUR life? Because this is YOUR life, ticking away, dealing with stupid, manipulative, objectifying bullshit. Based on some of the things you've said about your Hubs, you might want to check Out of the Fog, which is a website about personality disorders:
http://outofthefog.net/ Some of what you're describing sounds like Hubs might possibly have a bit of a disordered personality. The resources there might help you make sense of his thinking and/or give you ideas on how to communicate with him.
But in the end, I think you should do what makes you feel happiest and healthiest. You need to worry about you and your life, not his.