Grammar

vsuresh
"I feel sorry for you"
This sentence means that I feel sad seeing you in this condition.
And it means "you will regret for having done this and I feel sad thinking that." in another context.

When one says this, he may not be necessarily feeling sad for his friend. Though it is a statement of sympathy.

vsuresh"I feel sorry for you"
This sentence means that I feel sad seeing you in this condition.

Yes. I'm following you here.

vsureshAnd it means "you will regret for having done this and I feel sad thinking that." in another context.

Now I'm not following very well. What sort of context are you referring to?

Thank you very much for your response, CalifJim.

As for the second one I think this can be a context:

A person has become addicted to drugs and finds it hard to come out the habit.

Thank you, dimsumexpress.

I agree with you however I have this to say:

Though the person is into something wrong or bad, you feel sad because he is ignorant of the wrong or pain he is causing to himself or others.

In such a situation, you tend to pity the person, don't you?

Please share your view.

vsureshThank you very much for your response, CalifJim.

As for the second one I think this can be a context:
A person has become addicted to drugs and finds it hard to come out the habit.

Yes. I feel sorry for you makes sense in that context.

CJ

vsureshThough the person is into something wrong or bad, you feel sad because he is ignorant of the wrong or pain he is causing to himself or others.
In such a situation, you tend to pity the person, don't you?

I think it all depends on what the "bad" or "wrong" the person is involved with. If he is doing drug, drinking, gambling or being lazy at home, and