Cutty is right by saying make sure you plan ahead. There are 2 restaurants that I would recommend. One is Carmines, its on Broadway in times square, its an Italian restaurant, but its family style eating, so I dunno if that would be good for you and your girl! If you order a plate of spaghetti, you will get it on a turkey platter!
The other place I can say is great for lunch is Lombardis pizza, I seen it on the food channel and went… it was well worth it! Its in little Italy. Its supposly americas first pizza shop opened in 1905, brick oven pizza.
Its going to be rough if you are leaving at 4… as it takes like 6 hours from where I live, might be a little more for you. Thats a tough call… because about time you get there, park, unload the car, check in, etc… its going to be midnight almost. So dinners out… you could always go out and get wasted… but if thats not your idea of a good time, then I would just leave really early Friday night… like 3am or something.
Almost forgot to tell you, a really nice, and extremely good but expensive Italian restaurant is Il Cortile. If your in to the whole mafia ordeal, its a great place to eat, John Gottis office was 2 blocks away, the FBI has listened in on that place more than once! Also the cast of the Sopranos frequent it. You can check out their website… the food is excellent there!