People say, "Stop trying to be someone you're not." But if I want to be like this, then aren't I being myself?

to be what others tell us to be,, there is the error

BECOME who you choose to be, tho you will find it very hard around those that have known who you have been before, they will want you to stay that way

Outside influences can do that too you.

👍️ they should just mind their own damn biz.

Absolutely. Be who and what you want!

Just remember what you are in the given period of time to avoid confusions.
:)