You would not just have to leave for 1 year. You would be barred from reentry for a period of 10 years if you depart the US. Additionally, if your mother becomes a permanent resident and petitions for you, it will be many years before you would be eligible to even apply for a visa because of the backlogs in that family-based preference category. If you entered the US unlawfully, under the current immigration laws, there is no way for you to legalize your status within the US.
Answered on Dec 06th, 2013 at 6:14 PM