Formal:
* "Je regrette vos commentaires." (I miss your comments.) - This is the most formal and literal translation.
* "Je vous manque vos commentaires." (I miss your comments.) - This is another formal option, emphasizing the "you" and your specific comments.
Informal:
* "Tes commentaires me manquent." (Your comments are missing to me.) - This is a casual and more direct way to say it.
* "J'ai hâte de lire tes commentaires." (I'm looking forward to reading your comments.) - This is a less direct but still friendly way to express your missing the comments.
* "Tes commentaires étaient géniaux, j'espère les retrouver bientôt." (Your comments were awesome, I hope to see them again soon.) - This is a very informal way to say it, expressing your enjoyment of the comments.
The best option for you will depend on your relationship with the person you are speaking to and the context of the situation.