We all sometimes tell ourselves someone or some situation is responsible for how we feel. As we do this, we miss the fact that we're telling ourselves this story. It is an ordinary observation, a perception and interpretation. It is a thought, not a fact. In the moment, we often overlook that.
This is a temporary, innocent misunderstanding about how our minds work.
How you feel about a situation reflects how you look at it. Thought creates feelings, then covers it up by blaming circumstances. Falling for this ego trick, as we all do at times, is a form of self-sabotage (how we make trouble for ourselves).
Not realizing when this is happening is like picking a fight with reality instead of accepting what is. Developing your understanding of the Nature of Thought allows you to discover your mental immune system exists and always works flawlessly.
As with Nature in general, when left alone, it takes care of itself. Humans are designed with many built-in auto-correct features: stay awake too long, eventually you fall asleep; hold your breath, you'll gasp and start breathing before you ever pass out; bladder full for too long, it will empty with or without a toilet; get a cut, a scab forms.
The mind is also self-correcting. It defaults to quiet, creativity, and resilience - when you get out of the way. There are no techniques, tips, or strategies to make this happen. Auto-correct occurs on its own, when you allow it by not interfering (the progress when we stop making trouble for ourselves).
As you notice and understand this experience for yourself, you'll be able to help your teen get it too, resulting in a better day-to-day emotional quality of life for both of you.