Hi so my ex has now been recently diagnosed with bpd and now he blames me for giving it to him and ruining his life. I am new to learning about it but I’m pretty sure you can’t give someone bpd?? (Correct me if I’m wrong) 
Through out the whole relationship he would go from love bombing me one day and then being distant, accusing me of cheating, getting verbally abusive. 
I love him I really did but it was just so exhausting in that relationship (before he was diagnosed)
Now he constantly threatens to end his life if I leave him or he threatens to blackmail me.
He’s also heavily abusing adderall and I just don’t know what to do and how to help him or myself out of this