Unless they are both willing to do some inner work, they will just go on to find other partners and it will repeat over and over and over again and a pattern of victim consciousness continues. I thought I knew you. You don't look different, but you have changed. I'm looking through you. You're not the same.
Love has a nasty habit of disappearing overnight.
The reason this happens to everyone and is so archetypal is that the shadow side of us is so hidden from our consciousness. What's really interesting is that everyone else can see this part of us and we can't. We then become our own worst enemy, because anything unknown is not under our conscious observation or direction. Therefore, the enemy is us. When we are projecting the 7th house onto the beloved, he or she will bring up emotion and feeling, great highs and lows, physical sensation and intense passion.