It is not because I want your approval but because I trust you and, given your experience, I think following your suggestions is the best thing to do.
I'm sorry to have irritated or bothered you, I'm just very worried because my father's health condition has deteriorated and my sister is also not well, and I would like to get a green card to go back to my country and see them... Besides, if I can't get it now, I have no hope of being able to stay here... I'm just looking for help and reassurance because is not easy to be here alone in this situation.