Parents supporting wife.Forceful marriage.How to get divorce from her?

I empathize with your situation wherein you are married to a girl against your will and the one you love, is married to someone else.

The best way for filing a divorce is by the way of mutual consent. Alternately you can file a case by filing a petition on either of the various grounds under the Marriage Law.

Grounds for Divorce under the Hindu Marriage Act, 1955 are as follows:

Adultery / Cruelty / Desertion / Conversion to another religion / Mental Disorder / Leprosy / Venereal Disease / Renunciation / Not Heard Alive / No Resumption of Co-habitation.

Applying the above to your case, based on the facts mentioned by you, it seems unlikely that your wife will agree for Divorce through mutual consent.

Said this, we'll need more details from you to ascertain what grounds out of the ones mentioned above can be used to file a Divorce petition against your wife. What do you exactly mean when you say 'I am not in any kind of relation with my wife' ; Are you subjected to any kind of mental / physical cruelty by her, etc are among the many questions that we need the answers for before guding you with the way forward.