Communication
When dealing with young people it's important to address body language, tone of voice and attitude as much as you would their physical actions. The young person may not intentionally be aware of these things and how they come across, especially if it's acceptable in their home or school situation.
Young people may also become embarrassed during a counselling session and may become defensive or over react in all sorts of ways. Try to deal with emotions first, let the young person get composed or calm, before trying to communicate further.