Do people always want to be what they are not?

Do people always want to be what they are not? I think so. Why? Let me tell you something.

I experience this on my half. This guy as I knew is my friend but it turns not like that now. I don’t know why he turns like that. He is so very annoying. He always want to be like me or something like that. I don’t know but that is what I see.