if your therapist isnt helpful then find a different one. there is a site online (cant remember the name) where you can type in your location and your diagnosis and all the treatment options you want like DBT which is very helpful for people with BPD. You can list all of your diagnosis if you have multiple. I just switched to a new one I found off that site and I couldnt be more happy.

There isnt anything I wish I knew when I was first diagnosis but I wish I was diagnosed much earlier in life so I could avoided ruining some relationships.