You just asked the million dollar question. It takes love, lots of it. Then if your are both sane, which is unlikely, because we all bring with us a lot of old garbage, and it does not destroy any of you and if after all of that you still love each, then it is anyones guess of happens next. Therapy helps to take care of old wounds that have turned into hot buttons that your partner and you are so good at finding and pushing, not because you are bad women, but because you met for one purpose and purpose only and that is to grow. We do not meet people by accident, we fall in love with people that will allow us to heal from the past or our shortcomings, they will allow us to grow. Nobody said it was going to be a bed of roses, but if you realize that life is about growing and healing then find a way to grow and eventually let go of the past, because the past is gone, it no longer exists!!!!!!!! That is the most difficult thing to do! If you do not believe me, try it, it is a bitch, but maybe one day you will wake and you will see the light, feel free of the shackles of the past and realize that you were just therapy to each other and if your love is strong enough, you will survive it and still be together. That is all!