I've seen a few takes on the eye-marriage obkk thing where the Uchiha tell Obito he must marry Kakashi. But really, the Uchiha and Konoha in general are set on maintaining a heteronormative society (tho it wouldn't be for long with Minato, Tsunade, Kakashi or Naruto as Hokage), which makes sense with the clan's focus on heirs and genetics, especially those with kekkei genkai.
So picture this: Obito, annoyed at the Uchiha pestering him about Kakashi's sharingan, escapes those conversations by basically breaking Fugaku's brain. Of course Obito is a dumbass and didn't check to see that he had indeed developed feelings for Kakashi and now has to actually try to convince Fugaku to let him marry him.
Minato always knew about Obito's plan but he also perfectly predicted that Obito would fall for Kakashi.
Kakashi meanwhile is blissfully unaware of all this.
