How would you feel?

My boss, who was my friend first, sent me home for doing something he himself does. What’s more is, I didnt go for his position because I thought he needed it more, so he got it. My former supervisor said I was getting it if I had applied. Now, since he sent me home for something he does and usually laughs at when I do it, I feel as if I can’t trust him. I have no fake side, so who I am at work is the same as who I am outside of work.