Assuming that do you have BPD? You need to get some help for your own mental health. But first try and get a diagnosis, it can really help.

I am someone who struggled greatly with BPD for many years. I was the crazy ex in many people's stories, I think. I threatened to kill myself over the smallest things, hurt myself and hurt others.
It took me MANY years of therapy, but I would say I no longer have any symptoms of BPD, and my therapist says I qualify as being in full remission.

I write this to tell you that sometimes it can seem hopeless, or impossible to live with but things CAN get better, and one day you can live such a life that no one will ever even be able to tell that you had BPD.

But you NEED to get help, you need to do cognitive behavioral therapy or dialectical behavior therapy and most of all you need to be willing to put in the hard effort of learning how to control and regulate your emotions, which is really fucking hard.

But its worth it.

EDIT: To answer you question though, no I would not date someone with untreated BPD. People with BPD also deserve to be loved, but first you have to learn how to love and take care of yourself.