hmm,13 is a hard age,not full grown and not a child either!i had the similar situation.what i told my son was,that i don't like his friend and i gave my reasons,this brought on many arguments from him,and knowing that he will continue to see this friend whether i forbid it or not,i told him to invite his friend to our house[that way i could keep my eye on both of them]he did go on seeing this friend for several months and one day,my son told me that he won't be inviting his friend over again,because my son finally saw what i had seen!sometimes,you have to let your children make up their own minds about their friends,cause if our children are raised with morals,they will see for themselves that certain people aren't right for them!if you forbid this relationship,then she will see this friend in secret and after that she will not tell you who her friends are and then start doing many things in secret!
the best thing to do is keep reminding your daughter of the things that you like to see in people and also ask her what she likes about this friend,
and what she doesn't like about this friend,also ask her if she agrees with the way her friend acts,in greece we have a saying"show me your friends,and i can tell what you are!"
oh,i just wanted to add when i was that age i had friends that weren't as moral as i was,but since i was raised with morals,i knew what was good or what was bad,yes they were my friends,but eventually i saw that they weren't the kind of friends that i needed,and i just had friends that had the same values as i did!
the best remedy for this is,to have her friends whom you approve of over more often,good friends are so much better at giving advice to your daughter than you can ever imagine!once this friend of hers is looked down by her other friends,she will get the picture,and cut herself off of this friendship!
