historic crush 

An obviously unrequited love for a historical figure.

My co-workers hooked up because he looks like Abraham Lincoln, her historic crush.

historic crush by RwjKnowsStuff January 16, 2017

Historic Crush 

To like or have strong feelings for someone for a really, really long time.

"So Amber you're friends with Kyle?"
"Yea, why?"
"Tiffany has had a Historic Crush on him since like 3rd grade, maybe you can introduce them?"

Historic Crush by UES_queen14 June 12, 2019