People with BPD have a thing where when someone is gone it disappears from our mind. This is the reason why we freak out when people leave. WE have problems with "object consistency". It is like when u r really little. Out if sight out of mind. A small child or person with BPD thinks their parents/friends/family have abandoned them even when they r gone for a very short time. I used to be like that and never want to leave my T office but we worked thru that. I still had to look at his website to remember him.