If a guy likes a girl, but they lose contact for a little bit,does he lose interest in her?

I met this guy at a party(family party,but he's not family) and he was so nice and sweet to everyone. He likes me and I like him,but we couldn't exchange numbers because of our parents. Now after 2weeks of no contact,Im going over his house, because he is having a superbowl party. There wil be other girls there and Im nervous he won't like me anymore.