"I am thankful" is not correct?
Thankful and thank are not the same word.
"I thank" should also be accepted
It is not correct because it does not give a complete meaning
I thank you- also works
Are you telling or asking?
for me is I am grateful since is more formal than thanks or I thank which is barely used in English
Actually, "thanks" and "thank you" are both used used much more often than "grateful" in English.
"I am grateful" is not correct? How would you say "I am grateful"?
Ich bin dankbar.