worry about/be worried about

What is the difference between "worry about" and "be worried about"
(1) I worry about my grades.
(2) I am worried about my grades.
Is there any difference in the meaning?
Thank you in advance.

The second one sounds more natural to me. I have a feeling that the use of "worry" as a verb in indicative sentences is rather restricted. Of course you say "Don't worry" or "Stop worrying", but I have never heard anybody say "I worry" or "I'm worrying", just "I'm worried".

Concerning my last sentence, perhaps I wouldn't say "never", but at any rate quite rarely. I have heard somebody say "I worry about...", but "I'm worried" is far more common. It is more common to use "worry" as a noun, or "worried".

(1) indicates a more-or-less permanent state of affairs; it's nearly the same as saying "I worry about my grades all the time," or "I'm always worried about my grades."

(2) is a current state of affairs; it means "Right now, I am worried about my grades." That may or may not be the general case. For instance, the following little dialogue:

--I'm worried about my grades.
--Yeah, but you always worry about your grades.
--Don't you worry about your grades?
--Not usually. But after that last test, I'm worried about my grade too.

I agree with Easterner, i have yhe same feeling

Thank you every one.

Jacob's explanation above all was very nice. I had been long worried by this problem. But it now got completely solved. Thank you a lot.

saya

Jacob's explanation is the one to go by.