Catullus 87

Nulla potest mulier tantum se dicere amatam
No woman is able to truly say that she has been loved,

vere, quantum a me Lesbia amata mea est.
as much as my Lesbia is loved by me.

Nulla fides ullo fuit umquam in foedere tanta,
No such great faith was ever in any treaty

quanta in amore tuo ex parte reperta mea est.
as great as has been found in your love on my part.