Welcome to PC!

I am glad that you know that we cannot diagnose you on here. What you describe does show some borderline traits but not all of what the DSM states. You just need to have 5 of the listed traits in the DSM. Instead of that, read up on borderline personality disorder and this will help you discuss your concerns with your T or doctor.

Here is some info from The National Institute of Mental Health.

NIMH · Borderline Personality Disorder

I have a few traits of BPD but not the classic ones. Only you know yourself better than even the professionals so do take an active role in your treatment process when you discuss this with them.

Hope this helps some.

Best wishes!