Hey guys, I'm really worried about my 12-year-old son. Lately, I have noticed some changes in his behavior and I suspect that he might be abusing drugs or alcohol. He has become more aggressive towards his siblings and he is always asking for money. I have tried talking to him about the issue but he always denies any wrongdoing. I'm not sure what to do at this point and I'm afraid that his addiction might get worse if I don't take action soon. Do you have any advice or tips on how to address substance abuse or addiction issues with a preteen? How do I talk to him about it without making him feel cornered? Thanks in advance for your help!