so I took the time to make eevee have max affection in Pokemon amie, so how do I get it to evolve now >.<
You just level the Eevee up after reaching high affection, and have a Fairy move in its moveset (not confirmed; Eevee learns Baby Doll Eyes so level the Eevee up with that in its moveset; the Eevee has to be caught at level 19 or under to have Baby Doll Eyes though, since that move gets replaced at level 20).
& yea the hearts are Pokemon's affection level.