Oh man yeah my friend used to follow her husband into bathrooms too BUT he did cheat on her before so she was very stressed out, I don't think she has BPD though. But I found that calm place too finally!! I let go and said if he's going to cheat I won't be able to prevent it by worrying although sometimes the insecurity does pop up but I try to use distraction and wise mind. Thank you for your advice and kind words