My ex didn't try to come back, but she did tell me that she now regrets "how" she ended things, ie; for two months straight, she lied to me about the affair she was having, even though I knew something was going on, and begged her to tell me. She finally broke down one night and told me she was in love with a mutual friend.
Time went on, and I'm in a happy, ten year relationship. She's still with our friend, but they are financially unstable and make foolish financial decisions. I know she misses my cooking!
Really, it doesn't matter. What matters is that we all move on, hopefully to happier situations.