1. a friend of mine was dating a guy and he suddenly broke up with her. He said mean things like he doesn't like her anymore because she was not pretty enough for him, she had bad breath etc. he then proceeded to go after her best friend. That was at least 5 years ago, i don't know what transpired then or how they got back together, but i just saw their wedding photo on facebook.
2. my cousin and his wife were together for many years. one day i found out that they broke up and started seeing other people because they were righting too much. They were in their early 30s then. My cousin told me that although he was sure the relationship couldn't continue, somehow they were on each other's mind even while they were seeing other people. They somehow got back together and married a few years ago. Both are 38 years old and trying for a kid.