1 Although usually δέ (de, “now”; found in א A C D1 F G Ψ 0285 𝔐 lat) should take precedent over γάρ (gar) in textually disputed places in the corpus Paulinum, the credentials for γάρ here are not easily dismissed (𝔓46 B 0223 0243 33 1739 1881 ); here it is the preferred reading, albeit slightly.
2 Or “I decided this for myself.”
3 Grk “not to come to you again in sorrow.” Paul was not speaking absolutely about not making another visit, but meant he did not want to come to the Corinthians again until the conflict he mentioned in 2 Cor 2:4–11 was settled.

In other versions

For I made up my mind not to make another painful visit to you.

So I made up my mind that I would not make another painful visit to you.

In fact, I made up my mind about this: I would not come to you on another painful visit.

So I decided that I would not bring you grief with another painful visit.

For I have decided this for myself, not to come to you again in sorrow.

But I determined this with myself, that I would not come again to you in heaviness.

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