You were shy when you were young. You were outgoing when you were only 4. You were picky with your foods, you hated swimming when you nearly had a drowning experience. But now you’re outgoing, making friends, more polite, more reserved, swimming, and eating everything off your plate.
No, you didn’t change. You only managed yourself in different situations.
People don’t change at their core. The only thing that changes is how they present themselves in public. The front for other people. Their face for their partner.
People don’t change who they are just because they act differently from before. Everything is just management. Everything is just learned from experience. This is what you should do in this environment.
You’ll never change who you really are. The question is who are you?