How do I find who I truly am?

Who are you trying to impress? Girls?? The way to be yourself is to quit worrying about how to get them in the sack. If they want you, they’ll let you know! (It’s true! “Girls just wanna have fun.”)
You need to build up your self-esteem. Start saying “I can” instead of “I might be able to.”
Relax! Quit worrying about what somebody else thinks. They’re probably more concerned about themselves than what is going on with you…
Get a book on dream analysis, and another one on body language.
And, most important of all…

Have fun!

I just want to be accepted but I realize that it’s caused a lot of issues.

Maybe the people you want acceptance from aren’t for you?

You aren’t in high school anymore. You have enough freedom to go out and look for better people. Faking will not only do nothing to gain people’s acceptance but also drive good people away from you.

If you have tried to make yourself a hollow reflection of others, or of what you think they expect of you, it’s no wonder you aren’t sure. But you do not have to be the sum of other people’s opinions. You can define yourself, and it sounds like some people have tried to tell you that.

Here’s one approach: What do you love? love to do, love to think about, love to pay attention to, love to spend time on? Those are some clues to who you are.

Almost anything you really value in life has some way to share or express it, some aspect that you can engage with others in. That’s one way to start finding others whose esteem is worth having. Seeing what others value in you can help you see yourself differently.

Sometimes it can be a trait such as simple kindness, which is no small thing at all and takes no special talent.

Help someone else who needs it.
Volunteer for the children’s hospital wards etc
Then become the person that cares about others, instead of worrying about whether you are liked.
There are far more important things in life then worrying about “who you are” at this point you are still learning about life.

Life is an ever changing experience. Today you are not the same person you were yesterday. All your past choices make up who you are now, and will continue to build as you move on.

You are always, but never one’s self.
You are forever changing.

Constant, introspective.
Who am I?
What do I contribute, or take away from the world?

Do I affect society, in a negative way, or a positive way? ...

Why, or why not?

“What do I believe in?” “What am I passionate about?” Figure out those, and then explore them. “Are these honorable beliefs and passions?” “Am I proud of them?” And then find a way to engage in them; volunteering is a great way to start and may lead to a job doing something you love.

Good luck, you’ll get there.