I'm not who my family thinks I am.
Why do you hide you are from your family? Is there something that you are afraid to let them know about?
They are so controlling. I hate them for that.
You should be able to be yourself. If it won't affect you too negatively, you should be yourself around your family. You will end up happier in the end.
Maybe I should.
Yes, you should be yourself as they will then be able to appreciate all those good things about you that they never knew about.