Trust and Respect is the basic foundation of any relationship. 
Now you do not trust and respect her.But have you tried to? Although those two are the foundation, forgiving is the key to loving. So if you can forgive her and yourself. 
Remember that its Nepal. She could have been afraid of something to tell you the truth. But now that the truth is out, you guys are already married. So forgive it since it was in the past and before the marriage.
Is there not a such day that she ever showed love to you? Has she not respected you? Try to understanding her. Most of the time we think about ourselves. Like on this one, you are thinking only about yourself, you even thought of divorcing her after you brought her her. There is also a kind of thing called responsibilty. For once try to understand and let her understand. Speak. Do not let words drown. Talk about what you feel to her.And make sure do not argue.

Tara je garda ni bhayena bhane. If you think you wont be happy dont drag it.  Finish off everything when you think.