I have a few stories that are still ongoing and some not so great reconciliations.
1) One of the girls that I had to be a sponsor for was going through a breakup with her ex at the time, they're both military and he broke up with her because of the distance. It took them a few months to reconcile, and they ended up getting engaged and now are happily married! They're both really young but happy.
2) A close friend of mine, I was actually with her during the breakup we were just getting ice-cream and she received a message through Twitter from her ex's, ex girlfriend's now ex-boyfriend (I know I was confused typing this) how he saw the messages between them, how they wanted to be with each other etc. Basically cheated on her, she lost it called him and confronted him. He basically apologized, begged and groveled for like a month and she took him back! The relationship worked for a few months, but eventually she realized that the trust wasn't there anymore. Broke it off, and she found someone that treated her right and they've been happily together since! So there's still a happy ending for her.
I'm currently going through a breakup right now, and sticking to NC and who knows I might come back with my own story!