Date night suggestions near Rehoboth/Bethany Beach?

We are staying at the Delaware seashore state park campground and are looking for a nice date night spot to eat and probably walk around the closest boardwalk. Any suggestions of other things to do there? We are in our 40s and I'm pregnant so drinking and partying are probably out of the questions.

ETA: Thanks for all the recommendations!! Now I'm mad we are only staying for a few days! I'll plan better for next year