Hi Danee,
Welcome to the BPD Family
Thank you for sharing some of your background.
It all sounds like quite the sob story
I don't hear a "sob story" I hear an abusive childhood and that childhood clearly (and naturally) affected both you and your sister.
Are either or both of you seeing a Therapist? Having that support could be helpful.
How is your relationship with your sister? What do your interactions look like? Is there something in particular that you are struggling with in relation to your sister?
I'm glad you decided to jump in an post, there is a lot of support, tools, and ideas on this site, we all have someone with BPD or BPD traits in our lives and we "get it".
Take Care,
Panda39