When I was about 16 I had to make a conscious decision to not allow myself to feel as much towards the terrible things happening in the world. I would get so deep into feeling that it would wreck me for days sometimes. One day I just chose not to care, as if they were made up stories that I didn’t need to pay attention to. It worked but It changed my personality for years until I realized how to balance it, sort of. It still happens sometimes.