because they give you a request to be there friend
yes
sorry but i really don't think that's possible..
You look them up in the search box
go to find friends or search your friends that have a facebook
On facebook you can email to contact someone if you know thrit rmail address. On Home page you can invite friends by email. Hope you find that someone! CALL HIM/HER OR HESHE
Rummage through your friends list and see if they're still on there.
Look through someone that is friends with them, they might have a picture with them tagged in it.
if you know your friends myspace/facebook/AIM, you can easily ask them or ask someone who is closer to your friend then you are.
Bar , Facebook, whisper, tinder, other dating apps. For friends you can find similar online sites.
You will receive notifications on Facebook if someone is talking about you.
Yahoo is an email site. So... If you know their email you can find them. And if you have a facebook You can connect it and all your friends' emails would be in your contacts.
Log out of Facebook, turn off your computer, and go visit this individual in person and ask him/her to be your friend. It's quite simple and the true way to find "real friends" unlike the social nutwork.