Hope, Lissie, Always, and others said it better. He won't make it work with a new gf. He hasn't dealt with the past. His old demons will re-emerge. He is lying as Always said, he is skimming off the top, as Lissie said. If you aren't prepared to work on a relationshp that was good, how can you know how to work on one that is new. He doesn't have the tool kit

It is sad, but the person he is really damaging, apart from the new gf, is himself now. He may look good, he hopes for happiness. Oh Goody for him.