Mentally harassed by wife and in laws

I have been married for more then 2 years now but My wife use to lie a lot and we both are known to each other for more then 20 years as friend where she use to take advice from me in terms her family is not very good with her and she don't want to marry any guy bcz she likes me where me and my family already told her that this can't be possible so let ur family decide best for u ...but her family surrender infront of her and assured as that we will do best to Let this marriage bcz girls mom is sycho...but everything was lie ...her father didn't come for single meet after engagement and her brother after marriage said I don't accept this marriage ... thne for whole 1.5 year they didn't invite or called me but use to call my wife alone ...I did my best to hold this relation but now this has turn into fights ..from last 1 year we didn't sleep together....I said no for this relation now ...and my family also said the same but now her father is threatening by saying police support we will see u and how to get u on track ...please suggest what should I do and how I can save myself and my family