First off, *hugs* for your hurt feelings. I know what you mean, friendships w/borderline folk can be very very taxing.

Please be prepared to hear anything -- and I mean ANYTHING! - out of your now-ex-friend. Steel yourself to be blamed in vivid terms. Because Borderlines typically have pretty nearly no boundaries, make sure your own are well fastened down and don't get into all the whys & wherefores, you'll be there a week if you do!

Good luck!
best to you, Chy, crossing fingers for you!