Elbertviola

She has romantically and admitted that she loves the other guy. She admitted to her parents, relatives n friends that she is inlove w the other guy and the marriage from her husband was a planted long before they get married that the wife only wants to get a green card n as soon as she gets the gc she will move in w her other man.  Which she did move out n left her husband in surprised

Yes you need to file as married filing separate even if your spouse is not US citizen.
 
The forms my wife (USC) has done online, we put my SSN a 000-00-0000