I shouldn't watch cartoons from my childhood.
I was watching The Smurfs and… fffffff wow, Brainy IS SO tsuntsun for Clumsy. And Clumsy just constantly has Brainy on his brain, even when all the other smurfs throw him a party his only concern is "When is Brainy gonna get here? Do you guys know how AWESOME and FUNNY Brainy is? 8D"
And when, through contrived coincidence, Brainy thinks Clumsy is happy without him he literally says "the most mature thing" he can do in this situation is to Run Away Forever. So he does, after leaving a very obvious (to anyone but Clumsy) note as to his whereabouts.
Then Clumsy scours the whole forest lookin