There's a guy I don't really know that my friend knows and he likes me its not that I don't like him its just that I don't really know him enough to see if I like him what should I do?

Let him down gently.

Do you want to get to know him better? And if you dong like him just tell him that nicely

Have your friend bring him somewhere where's a big enough group to sort of watch and listen to see if you want to even talk with him. If you do talk, do it with others around too. That makes it easy to just say 'Oops what time is it? I promised I'd be home half an hour ago.'