What do you say when you meet someone for the second time?

Im glad to see you again. = if the vibe is informal. Good morning = if the situation is formal.

What do you do when you meet a guy for the second time?

If you are looking for some good second date ideas, consider going to dinner or an event where you can talk openly. The idea is to spend time getting to know each other. If you cannot do any talking in the movie theater, it is hard to gauge if you have a connection with your date or how your second date went.