I married my husband for 4 years. Now he got his 10 years green card and he took off without saying goodbye. I found him staying at his parents and sister house. He told me that we can not live together. His sister now helping him looking for another woman for him and he had a guts to ask me not to divorce him yet because he wants to apply for a citizenship first. I been crying none stop. Would someone please let me know what can I do? If I file a divorce with him, what would happen to his green card and can he apply for a citizenship?

It's great that you are still worrying about him. That shows you will make a fantastic wife for someone someday. He, on the other hand is only concerned about himself. If it were me, I would divorce him now. Separate the citizenship issue and the marriage issue. If he were a citizen and treated you like this would you divorce him? That should be your answer.