I’m a 29 y/o diagnosed with BPD about 3 years ago. Recently found out that I’m also a narcissist.
Used to be on medications to regulate my emotions but have stopped for 2 years.
Have stayed in a mental institution for a week, been on drugs and went into rehab for 6 months. Series of bad relationships and ONS. 
No guilt or remorse for what I did. Basically I don’t feel anything, I gave myself reason to “forget” my past and refused to face it.
I don’t know how to love properly or show love.
Currently in a relationship that I constantly hurt my other half. Hiding truths about myself by painting myself as a good person plagued with hurt by my past relationships.
I have cheated on a couple of my exes and I feel no remorse over my actions. And I have zero explanation for what I have done.
I do feel chronic emptiness inside the pits of my chest down to my gut but I have no answer to what that feeling is, but I doubt that is remorse.
He’s constantly hurt by me and he want’s me to change. I really want to change myself but I do not know where to start.
Anyone here experiences similar issues please share your healing journey with me. I’ll be forever grateful.
Thanks