As someone who is about to be divorced and has a child, the thought of finding out that a coworker is attracted to me would be great.

I would go on the date, be honest about things if they start to head into the psychical realm. Don't rush things but don't be afraid (I know easy to say hard to do). Remember you get to set the pace don't rush things you aren't ready for. As long as you are honest (that doesn't mean telling him everything right away) you will be fine.

Good luck