Yell obscenities at him
If he/she is your friend then it's easy to say them that you are annoying me please go away right now if he/she is not your friend then ignoring is the best option.
You can't add her as a friend on facebook because it's not the real Selena Gomez. A fan made her. You can make celebrities on facebook by if you go to Selena Gomez on facebook, go to create page and then you can find your way there. You can even make fictional charectors on facebook, too.
Im guessing that if you go to someone's profile and see them as one of your friends they are supposed to be a mutual friend
go to tagmypals.com
you go to there page and hit add as friend
It is easy. you go on find friends then press add as a friend wait for them to accpet and you have friends.
sorry but no one can make you go on facebook
no not really i depends on the security you have go to accout settings to change
You go to your notifications and then look for the friend request. :-)
Go to your friend's page and click "Add Friend"
go on her facebook page
go to profile >add firend