DS 14 has recently started spending more time with a particular friend within his wider friendship group. Although this friend hasn't done anything wrong as such he just gives me a bad feeling when I meet him and I have noticed a change in DS when he has spent time with him - cocky, argumentative, negative. The friend has a reputation for being a bit mouthy at school and his parents seem to allow much more freedom than we give DS. I have noticed that DS spends less time with his other friends since hanging out more with this friend. My gut feeling is that I need to somehow discourage this friendship but I know saying to DS he can't hang out with him will cause arguments because he hasn't actually done anything wrong.
Have any of you lovely MN people been through this? Is there anything I can do?
TIA