Mental harassment by ex girl friend

I have been into an true mutual love relationship for more than two years , me and my girlfriend have decided to marry as well shortly but from last one year she have been avoiding me by not answering my calls and always preferred to talk on whatsapp,,, we have been tuned very nicely for initial years and i have gone agaist to my family to marry her and stood by her, but her avoidance for me over the year with back to back follow up by me to meet her personally to resolve what ever issues she has , she didnt shown any interest to me and have kept me stand by over the year with mental torture late night messages etc and it was very irritating mentally typing for so long online rather talking on call which she refused always... i am no where right now as she made me alone and my family also did the same with me ... i have advised her to resolve all problems and take an healthy exit which she didnt... i want to know is there anything i can file a case on her based on mental harassment for so long and based on cheating.... pls advise at earliest...