I will put it out there just that he has, on many occasions, shown that he cares about how I feel. He just has no interest in giving up the actions that upset me, and I get that.
If he wants multiple partners, that's his right. And as has been stated, if I want the opposite, I have the right to pursue that elsewhere.
I can't just leave without talking to him. That is just not me. I may be one to avoid confrontation, but I do not sneak like that. If I was afraid of him, I could see that, but I'm not. I'll definitely talk to him before leaving, especially since I want to be able to have reasonable talks about contact and him visiting our son. I do not want to do that later with him being angry that I just up and took him.