Is he using me?

I've been having a thing with the guy I work with and Come to find out he's married but they're on the verge of getting a divorce. He's been sleeping at his parents house for the past week. I didn't know he was married until Friday. We haven't spoken since. We haven't had sex, but we've done other things. He is always telling me that he really likes me and that I am special and he hasn't felt this way about another person in so long and that he hasn't liked kissing someone as nearly as much as he likes kissing me. He's always making it a point to complement me and tell me good morning and he says he thinks about me nonstop while at home. I am not understanding why he would start a relationship with me while he has a wife. I've talked to my sister about it and she thinks he's using me to get into my pants but we've had so many chances and he hasn't done that. I also got drunk and was practically begging for it tmi and he told me no because he'd rather make love than fuck me and he said I'm not just a piece of ass. He's very respectful towards me. Then he opens up to me Friday about his wife and tells me they're probably getting a divorce and he's speaking to attorneys at the moment. So I am lost idk what to do. I really like him and he seems genuine. What am I supposed to do here?