How can I divorce my foreign national wife with green card?

Married to a foreign national with a 2 year visa who also has a college degree from a local university. I entered the marriage in good faith that we would be sharing the bills and rent. I have made the vast majority of payments for rent and electric bills with minimal assistance from her. Also, she does not even have a vehicle she is using my vehicle and insurance. I started out this marriage with over $20,000 now I have almost no money. I am lucky if I can live from paycheck to paycheck, and that is with working almost 60 hours a week not including the days that I report in for the National Guard for my one weekend a month drill. She almost always refuses to accept responsibility for her actions even when this issue clearly shows she is at fault. She always makes an excuse she has very little material holdings, the bed the TV’s and most of the appliances, I have bought and paid for myself with no help from her. We also sleep separately since we have been married as she says she cannot stand my snoring and we have limited sexual intercourse. In fact we did not have intercourse till the 6th month of our marriage. We have been married since January 27, 2013. She has had 3 jobs since she has graduated in Fall of 2012 but has not held any job for more than 6 months. She also has over $10,000 student loan which is the only thing she has been paying for in our marriage. She has also constantly enjoys living beyond our means as by drinking fancy wines and dining at well to do establishments that we cannot afford. She also looks out more for her needs without regards to others while I have been selfless slaving away trying to make do for us. Needless to say, I have been under much stress. I have considered getting a divorce on multiple occasions but do not fully know my options or other recourse of action.