If he "thinks about/texts another/sleeps with another woman" you say you don't know how you'll feel about it. Is that true? I can think of many ways I'd feel, angry, hurt, disrespected, lied to. Setting a boundary is not to change his behavior but to protect you and I know you know this as I've seen you write it here and you've done it.
I'm wondering what's different here or maybe I'm misunderstanding. I'm not trying to pick apart your choice, just to understand. I learn so much from others here.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss