Anything you deny or fight will fight you back harder. Don’t fight the fear, pain, disappointment, etc. Let it in and let it teach you what it wants to teach you. Then you can part as friends.
Figure out a way to teach the concept of zero-sum game vs. how giving and sharing actually compounds love and goodness.
Someone else getting a fair shake, or attention from someone you like, or well-earned rewards or recognition does not take away from us.
Celebrate those victories and encourage others to reach for more instead of jealously guarding what you have.
When things get scary, look for the helpers. This is true in physical crises and existential ones. SCOTUS just passed down a few truly horrifying rulings, including reversing Roe v Wade. I’m disheartened in all that’s going on, but was reminded to look for the helpers, the activists, etc. Look for them…and join them.
Ask them to think of foods that taste good and also foods that make them feel good. Involve them in lunchbox decisions, dinner planning and prep, etc. so they’re empowered by their food habits.
Look into a class for meditation for kids. I read an article on a Baltimore elementary school that replaced detention with meditation and had amazing success.