the majority of people with BPD also meet criteria for other varieties of personality disorder such as avoidant and / or narcissistic. given that some of the symptoms overlap between different disorders it isn't so surprising...

narcissism is mentioned in BPD. narcissists tend not to SI (cut) and swing to the 'alone empty and disgusted' kinda thing. yeah the feeling two faced aka feeling kinda different when one is in different moods (and very intense moods and very mood dependent behaviour) is a fairly typical symptom for BPD.

what kind of treatment are you having?
how is that going for you?

I guess you are still cutting so...
have you fairly recently started treatment?