Should i apply for divorces case

Hello all, I need few information regarding divorce i got married in 1998 and it was a arrange marriage in temple ,we have not registered the marriage,due to few problems with in marriage life i came out of it and stayed with my parents for few months later shifted to my own accommodation,we had few problem as my dad was not well ,i could not take it more in to legal . We separated in the year 2010 and it is almost 6 years and we have never contacted each other as he had no information about me and contact details but now from few days he has got the details of my contact num and keep calling,i want to get rid of it . I have a daughter and she is with me ,i had asked a advise of a Advocate few years before and they had told as the marriage is not register need not have to apply for divorce and it is been almost 6 years that you are away so not to worry But i need a second advise on the same ,as i have mentioned i have a daughter tomorrow her life should not be spoiled just because of this.Kindly advise