Please forgive my carelessness for having lost your watch. I feel so sorry to you.

Does the bolded part in the above sound good to you? Is it better to rewrite it as the following? Thanks.

... I feel very sorry about you.
"I feel sorry for you" isn't something one would say to another person, to my ears, it sounds a little rude.

Use: I am sorry/very sorry about it.
I think that it should be:

I feel very sorry for you.
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 Vorpar's reply was promoted to an answer.
But Vorpar, many a times, I have seen the usage of "for" after sorry.
Sorry for ...ing might be OK but sorry for you is strange, and we shouldn't use this.

Another: Sorry that I didn't ....
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