"Omnia vincit amor, et nos cedamus amori." - 'Love conquers all things; let us yield to love.' - Virgil, Eclogæ, X. 69.
"Difficile est longum subito deponere amorem." - 'It is difficult at once to relinquish a long-cherished love.' - Catullus, Carmina, LXXVI. 13.
"Si sine amore, jocisque
Nil est jucundum, vivas in amore jocisque."
'If nothing is delightful without love and jokes, then live in love and jokes.' - Horace, Epistles, I. 6. 65.
"Militat omnis amans." - 'Every lover is a soldier'. ('Love is a warfare'). - Ovid, Amorum. I. 9. 1.
"Qui non vult fieri desidiosus, amet." - 'Let the man who does not wish to be idle, fall in love.' - Ovid, Amorum. I. 9. 46.
"Sic ego nec sine te nec tecum vivere possum
Et videor voti nescius esse mei."
'Thus I am not able to exist either with you or without you; and I seem not to know my own wishes.' - Ovid, Amorum, Book III. 10. 39.
"Jupiter ex alto perjuria ridet amantum." - 'Jupiter from on high laughs at the perjuries of lovers.' - Ovid, Ars Amatoria, Book I. 633.
"Res est soliciti plena timoris amor." - 'Love is a thing full of anxious fears.' - Ovid, Heroides. I. 12.
"Quicquid Amor jussit non est contemnere tutum.
Regnat, et in dominos jus habet ille deos."
'It is not safe to despise what Love commands. He reigns supreme, and rules the mighty gods.' - Ovid, Heroides, IV. 11.
"Hei mihi! quod nullis amor est medicabilis herbis." - 'Ah me! love can not be cured by herbs.' - Ovid, Metamorphoses. I. 523.
"Non bene conveniunt, nec in una sede morantur,
Majestas et amor."
'Majesty and love do not well agree, nor do they live together.' - Ovid, Metamorphoses, II. 846.
"Credula res amor est." - 'Love is a credulous thing.' - Ovid, Metamorphoses, VII. 826. Heroides, VI. 21.
"Otia si tollas, periere cupidinis arcus." - 'If you give up your quiet life, the bow of Cupid will lose its power.' - Ovid, Remedia Amoris. CXXXIX.
"Qui finem quæris amoris,
(Cedit amor rebus) res age; tutus eris."
'If thou wishest to put an end to love, attend to business (love yields to employment); then thou wilt be safe.' - Ovid, Remedia Amoris. CXLIII.
"Qui in amore præcipitavit pejus perit, quam si saxo saliat." - 'He who falls in love meets a worse fate than he who leaps from a rock.' - Plautus, Trinummus, II. 1. 30.
"Scilicent insano nemo in amore videt." - 'Everybody in love is blind.' - Sextus Propertius, Elegiæ, II. 14. 18.
"Odit verus amor nec patitur moras." - 'True love hates and will not bear delay.' - Seneca, Hercules Furens, 588.
"Tum, ut adsolet in amore et ira, jurgia, preces, exprobrutio, satisfactio." - 'Then there is the usual scene when lovers are excited with each other, quarrels, entreaties, reproaches, and then fondling reconcilement.' - Tacitus, Annales, XIII. 44.
See also :
http://la.wikiquote.org/wiki/Amor
http://la.wikiquote.org/wiki/Mors