Can a boy and girl live with each other without marriage with sexual relation?

hi.no this is not good.in our religion Islam forbid us this work.Islam says that first u marry and you have sexual relationship. you think that if one boy live with a girl and the have the sexual relationship with her and the girl become pregnant.the boy leaver her and go anywhere.when the people come to know about that girl.they will not say that she is a good girl and suppose he become pregnant a boy or girl born to her.how she eat her and how she eat herself.his child future and her future will grow dark nobody will like him.that s why you follow the Islam and you will be a good person. and you know that everybody will die nobody will live here.no i am going in the mosque for ten day for worship my Allah good bye