Hi mirame, te miro, and I'm bipolar 2 , i have never got really mean in the way you said. But a month ago I visited my parents and my sister that is bipolar 1 knew i was there because i was flying low, I'm pregnant and havent had a blast, i had to leave most of my bp meds....anyway. She did say awful thing to me, and I was like trying to understand that eventhough we have the same disease we are different people. And deeply inside I know i love my sister, actualy today she wrote me an email saying eventhough she couldn't understand me she loved me. I cried, because i really though she hated me or something because she is in a paranoid phase and i just walked by in that moment, so she started sendind agressive thing on email after she made me cried and laugh after that.
My point is, Im bipolar too, and i dont understand her, i just can't but i love her. Because she's my sister. If you can't handle what your gf says or the way it affects you, maybe you are not ready for a relationship with her, and thet's ok, you shouldn'y feel guilty, you are free and you can make your choices. But if you do leave her stop trying to understand move on. If you stay go to a supporting group and beneath all love her, forgive, forget, and love her more.