My fiancé &amp; I have a long distance relationship. He lives around four hours drive away. We see each other once a month if that. 

When my fiancé visits, my BPD is almost invisible. I don’t cry or exhibit any of my other behaviours that I usually would. When I am alone &amp; he is gone however is a completely different story.  It’s almost like a light switch.

This is not typical behaviour for me around other people either. It’s only him. He does make me extremely happy of course but I feel like when he does leave I am crash coursing down again to my lows, for no reason at all. 

I feel at my worst when I am by myself. I have learnt to deal with this for years now living by myself but it never gets any easier. It’s not intentional either for me to be feeling or acting this way. 

Does anyone else have this issue? 