NET
8 For even if I made you sad by my letter, I do not regret having written it (even though I did regret it, for I see that my letter made you sad, though only for a short time).
Darby
8 For if also I grieved you in the letter, I do not regret [it], if even I have regretted it; for I see that that letter, if even [it were] only for a time, grieved you.
KJV
8 For though I made you sorry with a letter, I do not repent, though I did repent: for I perceive that the same epistle hath made you sorry, though [it were] but for a season.