Was this a romantic dinner, darkprincess, or did you take your child along? Did this person know that you and DH had dinner plans, but not the location?
This man does seem creepy and bizarre. I POD those who find him stalkerish.
Tiamet brought up an interesting point with this statement:
*Substitute a woman for a man doing this and I think there would be a strong suspicion she was moving in on the DH.*
If Tiamet is right, and he does have a *crush* on DH, it will be even harder to disentangle from the friendship. *Now I'm not saying that this is a given.* However such a scenario would change the way that you and DH need to deal with him.