My 16 yo daughter has started having hours long phone calls with the same boy that she dated briefly 5 months ago. From my point of view, they had a couple of very fun, passionate months together. They both were very keen for each other and I’ve never seen my daughter so happy and comfortable with a boy before. The reason it ended 5 months ago is because it became apparent to my daughter that he had some mental health issues. He takes medication for both ADHD and depression. He’s also rebellious and experiments with drugs. He implied that he might kill himself when she told him she was breaking up with him. Now they are talking again and will inevitably want to spend time together. What can I do at this point without her pushing away from me and finding ways to keep the relationship going without my approval?