Abstinence & Celibacy Support Group
The pressures of sex from peers, the media and culture can be overwhelming, but you are in total control of your body and celibacy is a choice that many are making. Find sanctuary with people who are choosing to abstain without fear of judgment.
I found my self worth improving as my time of celibacy went on. Hang in there!!!
I must say, only a blithering idiot would dare to judge you.
None of what happened is in any way your fault.
My best friend's daughter also suffers from BPD. She received years of therapy (most probably CBT) and knows not to stop taking her meds (it took awhile for her to "get it" that this is for life).
In time, you will hit on the right meds, at the right dose, alone or in combination. You just need to be persistent. A prescription of CBT probably wouldn't go amiss either.
Once you are feeling stronger you will be better able to sort out the good apples from the bad ones, boyfriend wise.
Good luck and best wishes for your future.