I woke up within a cold sweat with this botw/totk zelink headcanon but i like to think Link actually proposed to Zelda but in an unplanned unofficial way. Like...a week after totk happens and they're having their first breakfast at Hateno (or maybe Akkala) and Zelda's rambling about how she's sad she never recorded ancient food recipes she's tried at her time in the past and Link just stops her and goes "hey...do you want to get married?"

Zelda's visibly like ??? huh??? and he repeats it. She's a lil spooked cause where is this coming from. Also she's dense so she says "well...I've...assumed I'll be married sometime in the future..." not connecting that he's literally proposing to her and he smiles so sweetly at her and says "I mean with me. Will you want to marry me?" And he steps over to her side of the table and finally gets on one knee.