I have a personality disorder my T didn't disclose it to me for 9 months until after I saw another psychiatrist who diagnosed me with major depressive disorder. I said in passing that I thought I was borderline,and he agreed with me but said he wanted to treat me as an individual so didn't think it was useful to tell me. The main difference between my T and the psychiatrist was the amount of time I'd spent with each- but by then it was already 70 hours with T in comparison to 1.30 with the pdoc. So that's where the disagreement can stem from.

Treatment for personality disorders is possible- but most likely you are going to need long term treatment rather than just 8 sessions and it requires working with the right kind of T. When I first started around 18 months it was 3 months after I decided that I was going to kill myself. I didn't even know what I felt but it was so deep. It was the just constant cycling between the highest of highs and frequent suicidal lows mixed in with pure rages and constant self harm. The anger came out in sessions and was aimed directly at him T through acting out and hostility. Some days I told him that I loved him, the next that even his face irritated me. I tested and I pushed him. Two other T's told me directly that I was too high a risk to work with. Not everyone has the training to handle that so that's why I think she said she couldn't see you as it wouldn't be ethical of her to do so. But there are T's out there .

I would recommend the documentary : "Back from the edge" and "Having A Life Worth Living - Dr Aguirre's Insights", both of which are available on youtube.