Nate is one of the many minor Friends characters.
In the episode, "The Grand Hotel", he is portrayed as wanting to get the attention of Stephanie, and has a crush on her. In "LEGO Friends: The Power of Friendship", he is in 'Slam Dunk' as a girly hamster mascot.
He is Stephanie's official boyfriend and is friends with Stephanie's friends (maybe). It is unclear exactly who he is friends with. He is cool, easygoing, and generally a good person. Nate likes to hang with his girlfriend Stephanie, and will do almost anything to make her happy.