Hi, I suffer from Bipolar type 2 and I hate to say this, but it seems that although she may have BPD, how she acts and treats you is more of a narcissistic problem and not a Bipolar one. I push people away at times as I feel a burden to everyone that I love. But being BIpolar is not an excuse to cheat on you and make you feel unloved or hurt. Please try to move on, you do not need that negativity in your life. You deserve to be treated with respect. Yes, having Bipolar does cause mood swings, mania and depression. We struggle, but personally I do not disrespect people. I am totally self aware. Hope you find the happiness that you deserve.