If I were Xiao Liu, I would try to put down the so-called "arrogance", not to think about my family background, and treat myself as an ordinary person. When you get along with others, you should always worry about what others think. It's not difficult to get along with each other in a different way of thinking.
If I am a good friend of Xiao Zhang, I will always encourage him and tell him that our family is not for us to decide, but we can decide our attitude and our future. Believe in yourself! In fact, you have always been excellent!
If I were a good friend of Xiao Liu, I would also tell him: Your conditions are very good, but you can't be proud, because this is not the result of your efforts after all. So let go of your figure. When getting along with others, you can't be self-righteous. You should listen to other people's opinions and understand them more. In this way, you can have more good friends.