how to be comfortable with one's self...

First of all, maybe you should admit that you've never been comfortable in your skin.

Maybe you should look back and think about the things that happened to you when you were young. When you were forming your views of the world.

Maybe it had something to do with the time when you were in preschool and you were all playing with a frog on the ground, and over-excited you accidentally stepped on it.
And when you pulled away your foot you and the other little babies saw the frog's insides coming out. You remember how you cried later, to your na-na. You know you are sorry. Why don't you go ahead and forgive yourself.

And that time that you were playing live-action Star Wars with yourself one night when it was just you and Mom at home. I guess you were acting sort of official as you pretended to be a Rebel Commander walking around the base giving orders. And your mom who must have finally got so fed up with your games yelled, "Stop walking around like your so high and mighty!" Don't you think after all this time, looking back, she was just a tired mom. She was younger too, back then. She didn't mean it, is what I mean. But also, don't you think, for maybe once in your life, you could be proud of who you are, or of something you've done? 

And the time you heard your uncle call you, "a boring pain in the butt" behind your back to another old guy. Don't you think he was just a grumpy old man? Don't you think he just didn't like you because you didn't play sports like all of his sons, and you only played pretend? Don't you think though, after all these years, that playing pretend is much much better than being an asshole?

...go ahead and forgive yourself, be proud of who you are, or of something you've done, and playing pretend is much much better than being an asshole.