I think I like this guy, how do I know if he likes me really. Divorced and confused about dating?

So I went though a divorce a year and some months ago. Last December I started dating this guy. I realized it wasn't going to work out after months of trying and I broke up with him. It was a mutual break up and he understood. I just didn't want to hurt him because I'm not that kind of person. Friday night I went to a bar by myself. I was sitting there minding my own business but I was tired and under so much stress. I felt terrible. Anyways this guy sitting across the bar tells me I look bored and tired, and asked me if I wanted to dance. I did, after that I went and sat back where I was. He tells me I can come sit by him if I want, so I did. We talked a lot about our kids, how we ended up back here, music, people we know. Turns out his boss is one of my friends. We danced several more times, and it really is the most fun I've had in a long time. He was singing the songs and twirling me around. It was nice. I slid my arm up on his shoulder then I went to move it and he told me he was fine with it there. Anyways, at the end of the night I gave him my number, but he still hasn't called me yet. Things seemed fine to me. Tomorrow will be the 3rd day if he doesn't call. Well I was surprised tonight at work when he came into the store where I work. The girl that rang him out said when he came in he was kind of looking around. When he got up to the counter he kind of smiled, and clearly stepped over to see around her. She said she wondered what he was looking at. He said hey to me, and I turned around and smiled saying hey back to him. We made small talk, but I get a little nervous and don't know what to say. When he left she said thats the guy from the bar isn't it. I just smiled. I never described him to her. She said she could just tell. She thinks he just came there to see me because I had told him where I work. She said he only got $4 in gas but paid with a $20, like he just wanted to stop. I'm confused. I want him to call me, but I'm not pushing anything. I'm just confused about dating. I think I could really like this guy, but I feel like I have forgot how to date really. I just need a little help and a little input. I think I may really like this guy, but of course I'm scared of heartache too. Ive been through so much