Not every person is the same. If you do not stop comparing like you say you are, the only thing you will achieve is making yourself miserable and losing yourself in the process. Try to focus on the things you like about yourself. You may want to consider some therapy too. This could help with self esteem issues.
It's a mind effort. We are what we think we are, when you change your thoughts, change happens. So be the other you, the one you see and want. Yes, it takes some work but that's life. If you can see it you can be it.
You are who you are because you allowed your self to be that person. Being who you can be it's entirely up to you. Looking at other people will not solve your problem...learning your self and being unique will make you a happy person.