3 months back I met a guy he is my cousin , so I used to speak with him regularly that friendship has become love now. We loved each other so much but suddenly when he said this matter to his parents they didn't accept so he stopped talking to me.but now he is talking but as a friend he don't want to love because of his parents but he still loves me .please sir give me suggestion what to do

I would suggest you, to forget him... its quite normal in teenage to get attracted to their cousin's... how old are you both?

Don't be in a relationship or may be If you feel comfortable to be as friend so be it, but keep the relationship just as a ''friendship'', nothing more than that! And you said he is your cousin! So may be that's why his parents said no to him.