I realized that I have more fun at work than I do when I'm with my partner and I wish my coworker wasn't married
Do you have a crush on them?
I can see why some people would find him attractive, but I don't.
You shouldn't cheat on your partner. If you think that you might have the want to cheat then you should think about breaking up with your current partner.
I'm not going to cheat. I just want to wait to see how things work out.
I would argue that you are still willing to cheat if you think that, and it's harmful to your wife. Can you think about how she would feel finding this out? It can cause at lot of trust issues for the both of you.