Catullus 75

The Catullus presented in this poem is one who gives off the image of pulling his hair out as he frantically paces about thinking about Lesbia. He is at his wits' end trying to understand what to do about her.

Lesbia seriously seems to be cheating on Catullus, because this is the second time he's written a poem on the subject. Catullus accuses her of being morally wrong as well as ensuring the ruin of his own mind. Although he also chides himself for loving her so deeply, he makes sure to say that he's being destroyed se officia suo - Catullus never misses a chance to tell the world how committed of a lover he is.

However, he seems to truly be hurt by Lesbia's actions. He says that now no matter what else she does, he cannot possibly ever respect her again. For Catullus, respect is clearly an important aspect of a relationship; for Lesbia, however, it is not. This seems to be a large distinction between them. For all of Catullus's lovey-dovey "She's the best woman in the history of ever" ramblings, Lesbia is not half as morally upright as Catullus is.
Catullus doesn't seem to really care about this, otherwise he would have broken the relationship long ago. He still states that even though he will never respect her again, he will never stop loving her either, even if she does everything wrong.