Your T is right, though. I am an ambivert, but my introvert can come out really damn quickly, and I go from social to antisocial at the drop of a dime sometimes. I have learned that it can be off-putting to some when I am at a social event and I'm "on" one moment and then, suddenly, I'm like, "Okay! It's been great! I have to go now, byeeeee" *hugs all around* Or, actually, it's more like I just pay my tab, grab my purse, wave goodbye, and leave. Lol. I've lost a few potential friend groups because they just didn't get the "Ruari is done" method of peacing out. But, I've learned the hard way that if I stay past my limit, I end up in Trippin's shoes, screaming at a room full of people. It still happens, but in that rare event, it's usually with a good friend. And they're kind of used to me being high strung, so they are just like, "Whatever. Bye." Still better if I just mind my energy, though.

Anyway. The point is that you can't force yourself in an energy bracket to which you do not belong. If you're naturally an introvert, telling you to walk in, smile, and say hello sort of goes against who you fundamentally are, and it would backfire. You can still be an introvert, and make friends, without having to subvert or forcefully override what makes you you.