Troilus was the son of King Priam of Troy. His lover, Cressida, was sent to the Greek camp, where she betrayed him.
Thisbe had agreed to meet her lover Pyramus, but was frightened away by a lion. Pyramus killed himself because he thought the lion had eaten her, and Thisbe killed herself when she found Pyramus dead.
Dido, the queen of Carthage, was abandoned by her lover Aeneas.
Medea used her magic to help her lover, Jason’s father. Later, Jason betrayed her, and she murdered their children in revenge.