Your father in law cannot decide the fate of your marriage. Only you and your wife can.
As he is not allowing you to meet her, you can file a petition for restitution of conjugal rights under section 9 of Hindu Marriage Act.
Section 9: Restitution of conjugal rights: When either the husband or the wife has, without reasonable excuse, withdrawn from the society of the other, the aggrieved party may apply, by petition to the district court, for restitution of conjugal rights and the court, on being satisfied of the truth of the statements made in such petition and that there is no legal ground why the application should not be granted, may decree restitution of conjugal rights accordingly.