It's just Michael reflecting on how he had a chance to lead a different life and had started down that road for a bit but saw that he would lose closeness with his family. And then transition back and I'm sure he's asking himself why he didn't have the courage to give up the family life of crime then and how he ended up alone now anyways.

https://www.youtube.com/watch?v=r-I4VIR5yGg&feature=youtu.be