Let it be known that Fez does not like a lot of people, granted it's hard to make friends in the business he's in. But he's not a bad guy at all — we've seen the way he cares for Rue, Ashtray, and his grandma. A running joke throughout the show is that Fez can never remember Jules's name, despite the fact that they've met multiple times and she is dating Rue. So in season two's first episode, when Fez compliments Lexi's name and giggles with her throughout the night, the audience sees a new side to him.
As Lexi returns from looking for Cassie, Fez says "Where'd you go? I was starting to miss you." Lexi is sure that that is not true and Fez goes on to say that he wouldn't lie because she is the coolest person at the party. He ends the night by admitting that talking to her was the best part of his entire year and shyly asks for her number.