he probably was called out by the previous lady and she walked. makes sense, that now that he's blown it with the one he had, he's open to getting into something with you but my previous statement still stands, knowing what you know about this guy and his ways, is the affection and attention really worth it when you know it's likely to be split between you and the next woman of interest he comes across? honestly I think you've already stated what type of man this is and you're playing with fire if you get into something with him.