I have no support system except for my therapist and this board.
I don't either, there is no way for anyone who hasn't lived through a BPD relationship to ever fathom it; most commonly family and friends only cause more pain by invalidating us.
I would suggest you look at the overall picture to decide what is best for you and your family; try listing the good vs. bad in the different ways you can go, for both you and your loved ones. I know it's not easy, take it one day at a time.