HELP big relationship problem..?

i've been going out with my boyfriend for about 2 years now and we want to get married.My parents have never agreed but i secrectly meet him.In sri lanka they've arranged a marriage for him and that girl sent him a bd card and some clothes,i think she likes him too.. but i know he doesn't ,so i said why don't you tell her the truth ,but in sri lanka its different she might go and kill herself or sommit ! what can we do????