Hello 43yearsofthis and welcome

It does feel incredible to find this "tribe". BPD relationship challenges can be unintuitive and also largely invisible to those with more emotional distance. Finding others who can say "I get it... I understand" is so meaningful.
I'm interested to hear that you're aware you two have been high conflict for your entire marriage. How does that conflict usually show up (yelling, circular arguments, physicality, blame... other)? Are there typical "themes" to the conflicts (suspicion of infidelity, blame for being controlling, "you never support me"...)?
Do you have any children together? Do you think they're aware of the issues?
Lots we could talk about but I'll pause there for now to hear more from you. Really glad you found us;
kells76