Codependency Support Group
Codependency is defined as someone who exhibits too much, and often inappropriate, caring for another person's struggles. A codependent person may try to change, or feel shame about their most private thoughts and feelings if they conflict with the other person's struggles. If you are on a journey towards self-love, this support group is for you. Join us and find others...

The feelings you write down sound a lot like BPD. (It can be mild.)
I'd suggest going on that board, too. You may find some very like-minded people there. (I'm on it, too!)
There's also PTSD.
Sounds like your present triggers are from your past. Good thing you have a therapist to work it out.