I could not decide which status should I file my tax for this year.....

I got married out side the United States in March 2016, my wife is not in the United States and she never came before. She does not have either SSN or ITIN number. My taxable marital status in my paycheck is still single as before. I already filled out I-130 to petition my wife in the USCIS. My question is " What is the best status that I should file my taxes for this year?"