I don't know. You're probably doing something wrong.

But someone having a crush does not count as a "love interest".

Not sure what I did wrong

KylieMfever already detailed it. He was just a teen having a crush/attraction to her that too temporarily, it does not equate to a love interest. Then also, he was actually attracted to her because he was a clone of Clark as well as Luthor and shared some of the same traits.