How do I be myself?
Asking that question will always take you away from the answer.
Letting another person tell you how to be yourself is like following instructions on how to breathe. As long as you let another person do it for you then you will always be a prisoner.
In order to realise how to be yourself you must first understand exactly what you think you are.
The worst thing that a parent can do to their child when they're born is to name them because it instills in them from birth a sense of "I and not I" or "is and is not". Your entire persona is then constructed around the name until, as an adult, you identify with an immensely complex and multi-layered ego.
It is essentially like a house of cards.
The foundations of the pyramid are where your core beliefs reside and on top of it are built more and more layers until you hit the very top where your everyday thoughts sit. If you notice the top of the pyramid is very narrow in relation to the bottom. That is because, as the product of many years of conditioning, we tend to see the world through a very narrow tunnel of reality where there are few options.
We have become trapped within thought patterns that repeat over and over again until our life becomes a series of habitual routines.
The ego has such a grip over us that we will often blame anyone and everyone outside of us for all the problems in our life. But the thing is if we act a certain way then people will hold preconceptions of who we are and then subsequently repeat them back to us. It essentially creates a feedback loop:
experience --> thought --> experience --> thought --> experience
Your thoughts shape experience which then in turn shape your thoughts.
A girl is not responsible for the fear and anxiety you feel because what you feel is based entirely on how YOU perceive her. Basically you choose to feel afraid. How silly is that?
The techniques that we learn are just tools that we use to acquire what we want in life. But how can you know what you want if you are always thinking other people's thoughts and speaking other people's words?
To be yourself is to stop thinking and just breathe. It is natural and requires no effort on your part.
You just do it.