There’s nothing like a spur of the moment idea. Sometimes these are very romantic. Here’s a “last minute” idea you can plan for in advance.
There’s always this restaurant you & your sweetheart talk about trying. Without telling your sweetheart, get reservations at that restaurant. Now purchase a single long-stem rose.
Call your sweetheart about 30 minutes before she/he gets off work. Say you’ve got this “hair-brained” idea and invite them for a “last minute” dinner out.
Your sweetheart will be surprised when you (finally) drive up to the restaurant you’ve talked about. And he/she won’t know you’ve planned it in advance. Of course the rose might give it away . . . . Enjoy you “last minute” romance.