I'm having an open relationship with two people with BPD (I have BPD too)
So I'm 28 and my boyfriend has BPD traits. He's getting better and he's very stable with me. We have a relationship based on trust. I have a severe case and the girl I have feelings for even more severe. I recently told my bf that I have feelings for her. He suggested to have an open relationship where I can explore my feelings for her. He's not jealous. And he isn't the problem. The problem is this girl.
Our story: we met last year at a mental institution, we were roommates. We got together after a few months and after a while she changed mental institution. Something bad happened at her new mental institution so she told me she doesn't have feelings for anyone. I respected that even if it hurt me like crazy. I started to spiral: self harm, suicide attempts. I felt lost without her. After a while i met my current boyfriend, and he helped me tremendously getting better. On the meantime I still contacted her via text. We weren't consistent but we bever stopped talking. Until last week (withe the approval of my bf) I sent her a letter confessing my feelings for her. She cried. She told me she still liked me and if we met she's gonna kiss me. After that I told her we can be in a relationship. Shes also together with someone and likes me and another guy (she's polyamorous). She just told me her boyfriend doesn't agree in an open relationship so we stay hidden. She's inconsistent with texting and this hurts me. Like she's inconsistent with everything and she hurts me. I'm afraid she's gonna hurt me again. What should i do?