I know this is seirously wrong... but does he like me?

So I like this guy. I'm 17 and he's 39. He's one of my mom's friends and he has a girlfriend. However, a few nights ago we all met up and he told me that the next time I come to visit (we're currently on vacation in his hometown) that I should give him a call; then he asked me when my flight was to go home and told me that I should stay longer. Later that night I got rather tipsy off a few drinks and he and his girlfriend helped me. The next day, he called me to ask me if I was okay and he said that watching me last night was hard to stand. Then he asked me when I was leaving again and I told him I might actually be staying a week longer and he said that that would be best because we would be able to meet again. Is he just being nice? Or could he possibly like me?