You can't, you shouldn't have to "convince" anyone to be in a relalationship, either they want to be with you, or they don't. If they don't then move on.
shag her
they already are in an official relationship
A relationship is in most cases official when it's on Facebook.
is a man who convince people to believe what he do.
elaborate on the relationship using specific details
Just leave her be if she just wants to be friends.
running away from the family or area
by letting her do her own thing
if you have to convince a girl shes to young for a relationship, you might as well leave her because she is to young for a relationship. a girl knows whens shes ready and she'll tell you. or you could show her you dick juust like liam cotttle
I Saw a Man.
you should make it official when you think you really know the person very well and you have trust and really like the person make the relationship official
Just be yourself.