I've never understood that or rules governing the amount of time you have to wait before you jump back in the shark infested waters. Do we expect the women to sit around and not get laid? If anything, I'd expect that seeing the other person moving on would galvanize you into getting your shit together and finding someone better. For me, it was a pride thing. The idea she thought she'd found someone better for me. As it turned out, she hadn't, but it was the best thing for me.