See that's the thing though we don't know what the personal interaction between them is like.
Maybe this is someone that he can chill with, has an intense, passionate relationship when they are around each other, look forward to going home and seeing her and miss her when he is away and vice versa.
Give me a woman in my life that I don't have to be arguing with, drama filled, high maintenance and just a nag to deal with. Shit like that would just wear down a man looking for some peace of mind.
I mean look at Halle Berry, always having drama with some dude she is with and she is seen as beautiful. The dudes just get tired of the drama. Every man she has been with it seems something comes up.