4yrs relationship, 2years live- in, marr

We had 4.5yrs of relationship..he is my relative and we stayed in live in for 2years. .. he suddenly started hating me and asked me to leave place giving reasons. In next 3days (muh dikhai)with another girl happened and his marriage date will be announced soon.I'm divastated..I was crying and begging him for days on call, I got multiple anxiety attacks..clearly he was not interested and blamed me and made me guilty for not putting efforts in intial 2yrs of relation. If he didn't want me he should have clearly broke up with me earlier. but he chose to stay in secretive way, pull that last extract from me..kept physical relation even just 15days before he had final marriage tilak. he is my relative.he requested me not to tell his father.I don't know if should file police, want to do something here, he is enjoying without guilt& fear.He played with emotions for his desires its huge breach to my self esteem. nP.S. He also torn off all my notes of pshychotherapy I was going through.