crushing on, infatuated with
Er ist in dieses Mädchen verknallt.
He has a crush on this girl.
Ich dachte, er wäre in Chigusa verknallt.
I thought he had a crush on Chigusa.
— Battle Royale (2000)
Bist du in die Tochter vom Chef verknallt?
Are you in love with the boss's daughter?
— Mystic River (2003)
Tom sagt, er sei in Maria verknallt.
Tom says he has a crush on Maria.