Hi Eve! Welcome
I identify with what you've shared. On the home page here on the right is a link entitled something like "The 4 types of BPD" - I found this useful because I lead a good life generally, I'm in a committed relationship, have a great job, and have a wonderful group of friends. However, it's taken me HEAPS of therapy and personal development to learn skills to replace the dysfunctional behaviour I learnt in my family of origin and get to this point. The one are where I "act out" the most is in my intimate relationship. I overreact and have heaps of triggers, but over time I've learned (and am still learning) how to manage these better.
It's wonderful that you're here. Keep posting. Read other threads and jump in and contribute your thoughts. Read the info in the links on the home page. Ask questions and ask for help
CG