Around8 years of relationship n now she is disconnecting me

I am in a relationship for around 8 years with my girlfriend/wife.she stayed at my home for 2years by telling my family that we married in a temple n yes we did by her choice after that for 2 yrs when she was in PG she was involved in every of my family function,for last 2 years she is not treating me well n now in nov 2018 she told me about a guy she was attracted towards him,she never talk to him,to prove that i ask her to prove it but she failed somewhere,now for 3 months we are fighting,on 10feb i ask her to get engage wt me she came to delhi for that,then bcz of her family they decieded to do it on 14feb,we had a fight on 12feb now from that day till now engagement is postponed to november but now she dont talk to me,dont meet me as she says i fight her,yes i fight her bcz she mostly disrespect me or talk about things which create problems,now what can i do legally against her as she is not willing to come to kolkata wt me,want to stay in delhi,my family repu is gone,i wnt to end