I know you've heard these words: "Be yourself". But then when you start being yourself, people don't like your attitude, maybe because you're honest and they are too sensitive. That's a problem that at least 90% of people have, because all of them say they are themselves, but they change opinion to be accepted by a little group of people or by the society in general. Thing is, those people who say "Be yourself", they don't know what they mean by this imperative. They only say that because it sounds good, you know, people will accept them.
And that's the problem, you don't need people to accept you if they aren't accepting what you are in reality, when you are a person who doesn't know the importance of being yourself (but the real meaning) you indirectly attract false people, because you're being false.
That's why you have to understand the difference between things you need and things you want. Once you learn who are the ones who love you by the person you are, and who are the ones that want something from you, you're happy. Your ego sometimes doesn't let you see the reality and stops you to be criticized.
A real friend worth much more than 1.000.000 false friends, they make you feel empty when you're alone. But your real friends never leave you alone. I had that problem too, I used to be really stupid, looking for friends who didn't know who I was, they were always asking me for help them but at the hour of the truth, they left me alone.
When you're yourself, but really being yourself, not saying that you're being yourself, you attract people who love you by who you are, and not by what you give them. If you start today, giving your real opinion, saying what kind of music you like, saying whatever you want to say, yes, you will be rejected but lots of people, but also accepted but the only people that you need in your life. And the most important thing, you will be happier than ever before.