Thanks everyone for your replies.
I ended up attempting to leave today, but the emotional weight of it made me stop because I was having ideation. I reached out to my spouse to get help and be safe and managed to make it home.
Before I left, I sent J a pretty scathing message and blocked him...
I have tried parallel polyam in the past, but found it to be more difficult than kitchen table to handle.
J is asserting I'm their best friend at this point. I don't know where they even got that from, and frankly feel like it's so disingenuous and manipulative.
Honestly, it's not going great...
A year ago, my spouse (M) and I (M) agreed to give polyamory another try.
For some context: I have been in an open marriage before. I will not call it ENM because it was not ethical. First spouse used it to traumatize and control me.
Current spouse and I have had some brushes with ENM...