I am the nice guy. And I married a “not so nice” woman who did for me exactly what your husband has done for you. She passed away ten years ago and I’ve been the nice guy to a couple of perfectly pleasant, rather amazing women. I didn’t quite know why I had to leave them, but you spelled it out very well here. We weren’t making each other better people. I didn’t enjoy breaking their hearts (and yea, I broke mine too), but deep down I know, we’re all better off for it.