Hi inapickle and welcome. I'm so sorry to hear of the difficulties you are facing.
I would suggest posting any possible messages to your future DIL here before sending. We can help you brainstorm and check to make sure you
Don't Jade or invalidate like
Wools mentioned. Sometimes the way we normally say things will come off as invalidating when speaking with a pwBPD.
What do you want to say?
Could their not talking with you possibly be due to something else?