How do you show a guy you like him without flat out telling him?

I'm going on a date with a friend this week and I want to progress our relationship. What can I do to show him that I am interested in him with out doing the whole "I like you" bit. I've been out of the dating scene for some time now, so I would be thankful for some pointers.
How do you show a guy you like him without flat out telling him?
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