Should I wait for him or move on

I met this guy at work and started to flirt with me. We were emailing each other back and forth and we had fun with each other. We even gave each other nicknames. I told him that he shouldn't flirt if he had a girlfriend, (which someone else told me he did). He didn't, he said he wasn;t looking for anything other then friendship right now. I said cool! Well, we were flirting a lot and we were comfortable with each other. While I was waiting for a friend to pick me up at work, he snuck up behind me and said see you later babe and was grinning from ear to ear. Because of other issues at work he quit and got a better job. Well, at this time I was doing some art for work and he was impressed with everthing and was interested in what I did. He was looking at me differently. Before he left I asked for a photo of him and he took one at 1am for me with digital camera and gave me his email address and said he would keep in touch. Well that has been since July 1 and I have not heard from him. He has never broken a promise to me yet. And on my BD a friend had asked him to sign a card for me and she noticed he was shaking. He has never broken a promise to me yet.