Chloe Sullivan (Allison Mack) is one of Clark's good friends from High School. After writing for the high school newspaper, Chloe went on to work at the Daily Planet for years until she was fired by Lex Luthor when he took over the paper. She also has had an unrequited love for Clark Kent but eventually settled to just being his friend. She now has been dating Jimmy Olson and is set to marry him in season eight.
Clark: Have I told you how beautiful you look tonight?
Chloe: Yeah. But frequent reminders are always appreciated.
Chloe: I've given up so much for you, Clark. This is the only thing I've ever asked from you. Please? Please do this for me. Please save Jimmy.
Clark: I can't.
Chloe: That's good that you're embracing your Kryptonian side. There isn't really anything human left in you.