NorseWoman 
It's been 4 years+ since I stopped speaking to my ex.
Me too, I've maintained a practical relationship with my P through the time of my separation.
I think the boards will be useful for you as an adjunct on your recovery because:
I think I should stay here for awhile yet until I learn more, so as to not go thru this again.
Me too, this was one of my primary motivations for staying.
[...] in the hope to never find myself in that situation again—
[...]
"As a dog returns to his own vomit, So a fool repeats his folly."
Even when I felt "safe" enough that I wouldn't date/pursue a BP-styled personality again, I kept checking in because I felt I was learning more, strength-to-strength.
E.g., I learned not only am I in charge of screening out BP's in my dating, but also being empowered to
choose people who have those traits I want—a big part of that for us nons (I think), is not only
knowing we have that choice, but
feeling we have that choice too. A lot of us came from backgrounds where our feelings of entitlement were detached from our knowledge of what we're entitled to.
Here's two examples on answering the 'what comes next':
What to look for in a new partner Unhealthy attractionsI hope you'll make a personally effective choice on this; and you're enjoying your peace.