unpackshare, I hope you are still reading here. I think you might be confused by some of the acronyms, so here's some help:
BH - "Betrayed Husband" - a person whose legally married wife cheats on him (BW would be "Betrayed Wife", BS would be "Betrayed Spouse")
BP - "Betrayed Partner" - a person whose partner/girlfriend/boyfriend (not legally married) has cheated
WH - "Wayward Husband" - a person who cheated on their legally married wife (WW is "Wayward Wife", WS is "Wayward Spouse")
WP - "Wayward Partner" - a person whose cheated on their partner/girlfriend/boyfriend (not legally married)
MH - "Mad Hatter" - a person who has both cheated and been cheated on by their romantic partner or legal spouse
AP - "Affair Partner" the person outside the relationship who did the cheating with the WH/WW/WS
OBS - "Other Betrayed Spouse" - if the affair partner (AP) is also married, OBS is their spouse
People also use "A" for Affair, "R" for Reconciliation, and "D" for Divorce.
In your case, it sounds like you were married long ago, and you had an affair with A. So back then, you were definitely the "WW" (Wayward Wife), and A was a "WS" (Wayward Husband) to his wife. Since then, both of you divorced, but now it seems like A is back with his ex-wife (a BW), or maybe he never really left her.
Right now, from what I can tell, you are not married to A, so he is definitely not a "BH", but he thinks of himself as a "BP" (Betrayed Partner) because of your former relationship with Z, and he's convinced you that you are a "WP" (Wayward Partner) even though he was not actively seeing you or communicating with you at the time.
I agree with a lot of the others that what you did with Z was not cheating! What you're doing with A might make you an AP (Affair Partner) if A is still with his wife (or some other woman).
Honestly, from what I can tell, A doesn't seem good for you. Why are you so convinced that he's "your person"? Is it because he can support you financially, like buying you a car? Is it great sex? Emotionally, he seems to be making your life a living hell, and he doesn't seem inclined to spend time with you or support you in the home.
I would suggest working with your therapist on self love and self respect. You are chasing a guy who has made it pretty clear that he's happy to have flings with you, but he doesn't want to build a life with you, and he doesn't respect you. You have to believe that you are worthy of love and respect before you can find someone who will treat you with love and respect. A is not that guy.
[This message edited by NoThanksForTheMemories at 6:11 PM, Wednesday, April 23rd]