Thankyou for your replies, Pingo and Thatwasthat... .very comforting.
Literally every dodgy experience I've had in this relationship is shared somewhere on this forum. All so same.
I think I will lie low for awhile too, as I don't want to hurt him. I'm not interested in dating, I'm actually still attached to him, in my heart. I was extremely committed, now it's hard to un-commit... .early days yet. But friendships, even those, with males that is, I think that would hurt him and I can wait, so it's not necessary to cause that pain. We are still in contact. The feeling of being owned though, is really all in my head, and my choice, I'm pretty sure. It's my very own anxiety response... my turn! Argh!
Jealousy is just so silly, when someone clearly adores you... but that's BPD. Irrational, somewhat blind, and all the rest.
Of course, I gave my 'power' away -- I handed over my choice-making by trying to assuage his paranoia. I do take responsibility for that. What Thatwasthat says is relevant here too, in that one can unlearn this foolish way of bending to someone's fears.
I do look forward to eventually feeling open and brave enough to let new friends into my heart.