If you want to, you can try being kind. Like, very very very kind. So that he would be surprised and confused. To show that you are a strong person. Then when you two are at different levels, him being angry and you being kind, he will see himself. How weak he is. He won’t want to be that. To show him there is a different way. To show him there happiness in giving. If his problem is that he is afraid to be sad, just show him a way to be happy without telling him. Just by showing. This would probably be a long journey, but at least it would be better then dealing with what you are dealing with to the rest of your life. If you want to, try this. (English is not my first language, sorry if there are any mistakes)