Flirting or not?

Kadie • :)
I'm 19 almost 20 and by my past I'm not really good with relationships. The last time I was in one I was 16. I've been on and off friends with guys the other 3 years though. I've been going to the gym here lately and there is this guy always there. It's a small town so basically every one knows everyone in there. I'm about the only girl out of the 20 plus people in there he talks to. He will walk by and say "you dropped something" or say "you better not skip next time" he always smilies at me. But I don't want to be over thinking this. He just recently went through a divorce and has 2 kids. We have been messaging a few days on fb but just small talk about the music in the gym. I didn't know if that was his way of being nice or he may actually like me. would really appreciate the opinions!!