This guy comes into my work place occasionally for his store which sells video games. Last week I went into his store because i love to play video games. It wasn't too busy, and I stayed for about an hour. Every time he had to help a customer, he would come back over to talk to me. I went by his store a couple more times during the week and he always smiled and talked with me. One time he had saved a strategy guide for me for a game i bought, when they were going to throw all of them away. Obviously he had been thinking about me. On Friday, i said that we should hang out and he agreed and we exchanged numbers. I called him on sunday to see if he wanted to go have coffee when he got off work. He never called me back. Today, one of my coworkers said she saw him at a restaurant on friday night with a girl. She said that when they called their table, the guy was talking to my coworker and the girl just went off to the table without him. She said that they didn't seem lovey dovey. Should I continue to show an interest in him, or do you think this means he's seeing someone else? Please help.