Every Hero's Romantic History

[Slimybug]

I'm a completist, and a big part of a character's history through the years is the people they've fallen for. I started another thread long ago called Batman's Entire Romantic History, and that was a lot of fun to compile. So over time I've done it to other heroes, on my own.

Rather than wasting space on here, you can find my OCD chroniclings at characterromance.fandom.com. But I have a few questions.

First question: It's kind of traditional to think of Jimmy Olsen and Supergirl as having some sort of thing, especially in adaptations: Smallville, Supergirl. He even showed up in the Supergirl movie. Does that have any basis in the comics, I mean for the Kara/Linda Lee version?