PREFACE: NOT ASKING FOR A DIAGNOSIS BUT ASKING FOR ADVICE HOW TO BRING THIS UP TO A PSYCHIATRIST TO SEE IF I HAVE BPD OR NOT

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ALSO don't know if i flaired right i'm sorry this is my first time posting after lurking for a hot minute

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i've suspected i've had BPD for a few years now except the problem is, i hide a lot of my symptoms.  i currently have bipolar II which i suspect may actually be bipolar I but whatever.  i know i at least have traits.  i have a friend who has textbook BPD (i hate to put it that way) but i feel bad since i know it's not as severe as her but i internalize a lot of feelings that i feel would meet criteria for BPD.  one of the ones i know is a big one with me is i split on people constantly.  i've had identity issues my whole life and unsure of who i am and almost absorb personalities.  i have horrible mood swings and anger to the point where tonight my boyfriend had to say "babe please don't start punching the walls".  

i've thought i've had this for years but it seems to be getting worse.  i don't know if it's my bipolar getting worse or if it's BPD.  does anyone have any advice on bringing this up with their psychiatrist?  i have an appointment in a month and a half and i finally feel like i have the courage to bring this up.