is BPD learned or hereditary?

i don't really know the answer to this. i'm sure there's some big medical explanation on one of the bpd websites. however, i'm beginning to think that it may be learned. a lot of people in my life have abandoned me over the years, so maybe i have learned that it doesn't matter who you are, you will eventually abandon me. is this why i am so worried that my boyfriend will eventually abandon me and i will never hear from him again? every time he steps out the door i become completely scared that he will leave and i will never see him again because he will realize that he doesn't actually love me. even if he says he will be back later i never believe him. i guess my ultimate fear is being alone. nobody wants to be alone i guess. but i feel like i would not be able to function if i was alone.

having a good run..for now

i haven't written in a few days because i am having a good run of good days :) this doesn't happen too often so i'm happy..kind of. deep down i'm still upset about many things in my life, but for right now i'm forgetting about that and going with this high that i am on. when i'm in a good mood, i get a lot of things done. but if i stop for a second to have a chance to stop and think, i realize how incredibly lonely i am. i am able to mask that for now and continue on, but it's only a matter of time until my world comes crashing down once again...