Just a side note for people reading. Being bi/ poly, does not mean we all feel entitled to multiple partners.
I for one fully focus and commit to my partner. If WE want to bring someone else onto our relationship, it is after a long and Frank discussion.
We do not go about hitching up with other people and strike up separate relationships.
I just wanted to be clear on that.
Anyway to the OP, I hope you manage to be successful on your own it would prove an excellent example to others with similar disorders.
I thinkaintaining NC with your ex would be kindest on you both in the future.
All the best.