You will find many social networking website but the most similar website with facebook is www.dosti.altervista.org, the functionality of this website is 100% same to Facebook social network.
You have to signup and make an account in very easy steps withing one second time and will make freinds, add as friend function, group function, page function, and super notification.
This website can be use on mobile, tab, google chrome. Also android application is available of this website.
so hurry up to check the facebook alternative website. http://dosti.altervista.org/