I agree with what everyone else said on here. Especially Bill. Stay away from him. Like someone else stated, if he is willing to cheat on his wife, then he'll eventually cheat on you too. And karma is a ****** as well.

It sounds like he probably just likes the attention and the ego boost. A lot of people flirt for these reasons. It doesn't necessarily mean that they really like you. It's more about getting validation and making them feel as if they're still attractive to other people.

Don't forget, it's mostly an ego thing. Don't encourage him in any way. Ignore him. Be friendly, but ignore him if he tries to flirt with you. If you flirt back, you're just going to encourage him to do the same. Leave the area if you have to claiming to be busy, or that you have work to do, etc...