So I have borderline. I was wondering if anyone else does and can relate because I am so tired of trying to explain these feelings to those around me. I have one other friend who has borderline and we connect so incredibly well that I feel as if we share the same vibrational output. So my question is does anyone else with BPD feel as though there is some sort of other entity that lives inside of them? When I was younger it was much stronger and when I was doing drugs it was too, but it still will come and not completely takeover but basically share my body when it is provoked. It's something that embodies the BPD traits. It is the one that becomes incredibly sexually promiscuous, impulsive, has mood swings, and caused me to cut myself for the first time in 2 years. When it is present I am too though. A few months ago I got irrationally jealous of my boyfriends roommate even though she has a boyfriend and does not see my boyfriend that way. I got so angry that I went home and cried and not a normal cry but an overly dramatic cry that led me to thoughts projected into my mind by this entity that were saying to hurt myself while I was trying to calm the entity down by talking to it, then I couldn't resist the urge it was giving me to cut and I did and felt awful afterwards. After I hurt myself the "voice" stopped and I felt drained. Another example happened the other day where I was feeling melancholy and bored at my mother's house (I was there visiting my dying grandfather) my boyfriend started talking to me about spiritual things and I told him about the first time I had my tarot cards read by my ex during the blood moon (a Wiccan that believed in dark spirits). When my cards were read we both felt a great darkness and I felt the entity overtake me, this was the first time I felt completely gone and blacked out until the sun rose. Apparently I was being violent and my movements were very rigid like someone possesses but I don't know if that's true because I don't know if I believe my ex, but still I blacked out. But back to the other day, I talked with my boyfriend about it and the entity came out again this time being very strong and being extremely sexual with my boyfriend and the rigid body movements happened again. My boyfriend realized it didn't seem like me and asked about it but I was still somewhat present so me and it went back and forth talking to him. While the entity was very energetic I would be exhausted when I came to and when it passed I fell asleep. 
I guess my point is, do any other BPD people feel as though they have an otherworldly or spiritual entity residing inside if them? My friend with BPD has said she has experienced a similar sensation of another thing inside of her. I would like to hear your stories and know if any of you understand what is happening. 