Every once in a while some idiot will tell me I should smile and talk more. You know what, I used to smile and talk more (though I was still an introvert). I also used to be a people pleaser. Then there was the mass betrayal in the early 2010s, and shortly after moving I realized so many people treat me like an entertainment source, a toy they can fool around with for a while. People meet me for the first time and right away they just want to tease me, make rude and unsolicited comments, or some other form of subtle abuse.
So now I'm more reserved and only make conversation to people I trust. I have enough self-respect not to even bother with people who give off a vibe of "I'm going to be an idiot to you." Of course, they don't like this, and they tell me I should be more open and outgoing like they are.
It's funny, people have already changed me, but not in the way they apparently wanted, and now they can't change me back.
They don't even know me. These people who meet me once, tell me how I should act and live my life, and then never see me again have no idea who I am, what I've been through - WHY I am the way I am. And they certainly don't know I'm autistic; I reserve that information for people I'm considerably close to and trust VERY much. People try to change me for themselves, so THEY'RE comfortable around me. Never mind my feelings. I'm just a doll to them.
Edit: Actually, even as a teen, before the drama of a few years ago, I complained in my journals about people trying to change me according to their personal preferences. So it's not a new thing, I guess. People are just intolerant of quiet people, or anyone who doesn't blend in.