Become a politician. You'd have an hide thicker than a rhino within a week
Work on loving yourself. Eventually you won't give a d@mn what anybody thinks of you, then you can be yourself freely.
I don't think you can change who you are. Everyone is different and you are "just you." Nothing wrong with showing your emotions...
Like the calluses in your palms that forms with repetitive work. Just so your emotions
Watch the news.