Hey there Midnight,
Well you've just about described me, and I identify with the BPD diagnosis. I'm sure you'll find new insight and a lot of support here at PC.
I also have inappropriate anger, a fleeting and malleable sense of self, dissociation, splitting, abandonment issues, paranoia and overanalyzing, I throw tantrums sometimes, severe and very fast mood swings, lack of integration...My form of self-abuse has been heavy use of drugs and alcohol, and I've never really been suicidal...otherwise, you sound just like me.
Let me just tell you that
you're not alone. It's a hard disorder to come to terms with, but recovery is available and possible. Perhaps this could be a good place to start:
www.dbtselfhelp.com
Dbt (dialectical behavioral therapy) has helped me significantly in dealing with my personal struggles with BPD.
I hope you find as much support as you feel you need here.

Welcome to our big dysfunctional (but loving) family.