I've noticed warning signs that my troubled teen could become violent. What can I do?
If you have built up a close relationship with your teen, talk to him and try to understand the pain he is suffering and to help him in any way you can to alleviate it. Your teen sounds like he may be too overwhelmed with emotions he cannot handle and may explode into violence as a consequence. You need to ease that burden and you may need to enlist the help of a therapist who sees many troubled teens in his/her practice. You might also offer to go in with your teen to the first visit as a show of family strength and support. In no way should your teen be made to feel that he is "crazy." He should know that you love him dearly; that you know he is being eaten up inside by overwhelming thoughts, feelings, and circumstances; and that you will not let him continue to suffer in this way.
He may lash out at you and refuse any professional help, but from how you have described his condition, you can't just "hope for the best." Find out all you can from the parents of his friends, from school personnel, and from his friends, who may be very worried about him as well. It's also a time where siblings need to tell the truth about what they have seen and heard, even at the temporary cost of his feeling "betrayed" by them.
This is a time when all extended family and friends need to pull together to diffuse any impending violence and to form a support team, along with professional help, to help your teen regain his sense of well-being and self control.