You probably already know this but if he is in the process of moving on (lets be honest this is practically ALL cases) his reason for contact may simply be as an emotional 'blow off' valve because he knows he can come to you with his problems. It seems like they will also do exactly what you describe to put the feelers out in case they need to withdraw back to you (recycle) or just as a shoulder to cry on.
It could be is using you until he locks his replacement down. How thoughtful of him... .
His needs will ALWAYS come first. If yours are met too that's an added bonus but remember, it's all about HIM.
Why can’t they ever be upfront? Consistent, stable, normal, straightforward! Why the game playing?
The game exists because we are dealing with emotional children. Trust me on this, logic does not, and will never work. What you just described there is what I want, stuff it
EXPECT from my partner in times of conflict. Something we will never have with a BPD.
Seriously good luck with your decisions, I don't envy what we all go through here on my worst enemies... .and we aren't even the disordered ones!