If Only (Reprise) is a short reprise of the song "If Only" that Mal sings while she is making an anti-love potion for Ben, because she doesn't want him loving her to be a distraction when the villains take over Auradon. As Mal unwillingly continues making the spell, she breaks down crying because she realizes that she has fallen in love with Ben.
A million thoughts in my head
Should I let my heart keep listening?
I know it's time to say goodbye
So hard to let go...
Mal cried and got the "tear" for the brownie ingredients.