All you can do as a parent of a teen is try to lead them in the right direction. You cannot pick their friends for them though. The more you try to, the more they will push back and start hiding things from you. It's better to lead by example.
They try to do the opposite of what parent's say at this age. So step back and watch to make sure the other teen is not getting your child in any trouble. A lot of friendships fizzle out on their own if you step back and let it happen on it's own.
