Myself

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I wonder if "1" and "2" have the same meaning.

If so, I would like to know which sentence is correct among "3" and "4".

1. I felt sorry for myself(,) being home alone on christmas day.

2. I felt sorry for myself as I was home alone on christmas day.

3. I felt sorry for myself being home alone on christmas day.

4. I felt sorry for myself, being home alone on christmas day.