Dating older men

I've been seeing this guy who is 15 years older than me and has 4 kids. He's engaged but they don't speak to each other, live with each other or anything like that. We spend a lot of time together and we always have lots of fun. He has never disrespected me, he always treats me like an equal. He has way more good qualities than bad ones. But I want to know, am I wrong for dating him?