“I love and hate.” “At once?” you ask, “Now pray explain.”
“I know not how; I feel ’tis so, I’m rent in twain.”

[Odi et amo. quare id faciam fortasse requiris
nescio, sed fieri sentio et excrucior.]

gaius valerius catullus
Catullus (c. 84 BC – c. 54 BC) Latin poet [Gaius Valerius Catullus]
Carmina # 85 [tr. Symons-Jeune (1923)]
    (Source)

(Source (Latin)). Alternate translations:

Tho' I hate, yet I love! -- you'll perhaps ask me, how?
I can't tell; but I'm vext, and feel that I do.
[tr. Nott (1795), # 82 "On His Love"]

I hate and love -- ask why -- I can't explain,
I feel 'tis so, and feel it racking pain.
[tr. Lamb (1821), "On His Own Love"]

I hate and love -- wherefore I cannot tell,
But by my tortures know the fact too well.
[tr. T. Martin (1861), "Love's Unreason"]

I have and love. "Why do I so?"
Perhaps you ask. I can't explain:
The bitter fact I only know,
And torture racks my brain.
[tr. Cranstoun (1867), "On His Love"]

Half I hate, half love. How so? one haply requireth.
Nay, I know not; alas feel it, in agony groan.
[tr. Ellis (1871)]

Hate I, and love I. Haps thou'lt ask me wherefore I do so.
Wot I not, yet so I do feeling a torture of pain.
[tr. Burton (1893), "How the Poet Loves"]

I hate and I love. Why I do this, perhaps you ask. I know not, but I feel it happening and I am tortured.
[tr. Smithers (1894)]

I hate and love. Why I do so, perhaps you ask. I know not, but I feel it, and I am in torment.
[tr. Warre Cornish (1904)]

I hate and yet I love; perhaps you ask how this can be. I do not know, but that it is so I feel too well, and live in torment.
[tr. Stuttaford (1912)]

I hate and love. You question "How?" I lack
An answer, but I feel it on the rack.
[tr. MacNaghten (1925)]

I hate and love, nor can the reason tell;
But that I love and hate I know too well.
[tr. Wright (1926), "Odi et Amo"]

I hate and love.
And if you ask me why,
I have no answer, but I discern,
can feel, my senses rooted in eternal torture.
[tr. Gregory (1931)]

I hate & love. And if you should ask how I can do both,
I couldn't say; but I feel it, and it shivers me.
[tr. C. Martin (1979)]

I hate and love. And why, perhaps you’ll ask.
I don’t know: but I feel, and I’m tormented.
[tr. Kline (2001), "Love-Hate"]

I hate and love. You wonder, perhaps, why I'd do that?
I have no idea. I just feel it. I am crucified.
[tr. Green (2005)]

I hate and I love. How do I do that, perhaps you ask?
I don't know. But I feel it is happening and I am tormented.
[tr. Wikibooks (2017)]

I hate and I love. Why I do this, perhaps you ask.
I do not know, but I feel it being done and I am tormented.
[tr. Wikisource (2018)]

I hate and I love: you might ask why I do this --
I don’t know, but I see it happen and it’s killing me.
[tr. @sententique (2023)]

I hate, I love; I love, I hate.
But why, you ask again.
I don't know if it's fault, or fate,
This such exquisite pain.
[tr. Hill (2024)]