I was "diagnosed" about 3 years ago...there are different types and different characteristics that are stronger in some than in others. I hope your therapist will allow you to understand and find which ones resonate with you. If possible, I also recommend NOT putting that diagnosis on any health insurance form...it is a red flag for people with biases against the diagnosis and also for insurance companies as they see that BPD patients use more resources and cost more than some other diagnosis....just use depression or MDD or whatever as your primary diagnosis... They are some really good books like Buddha and the Borderline...a firsthand account...and websites that discuss different types of BPD. Some you will relate to and some not. Use what works for you...best wishes..
WB