Depending on who you see performing it, the church confession scene with Benedick and Beatrice.
"I do love nothing in the world so much as you. Is not that strange?"
It's followed near immediately by Mood Whiplash, but Benedick and Beatrice finally admitting they love each other and Benedick's heartfelt "Come! Bid me do anything for thee." That is love.
"I do love nothing in the world so well as you: is not that strange?" Sweetest delcaration of love ever.
