Ad Lesbiam (Catullus, Ep. 73)

That me alone you lov'd, you once did say,
Nor should I to the king of gods give way.
Then I lov'd thee not as a common dear,
But as a father doth his children chear.
Now thee I know, more bitterly I smart;
Yet thou to me more light and cheaper art.
What pow'r is this? that such a wrong should press
Me to love more, yet wish thee well much lesse.
I hate and love; would'st thou the reason know?
I know not; but I burn, and feel it so.