That's a smirk

Eh it can also be used as a half smile or to hide pain

add a small blue tear in the eye and call it hide the pain.

LOL

But what if you weren’t crying and you were just trying to hide pain?

but hiding the pain is a small tear that roles down your face. Just one.

Thats another way to tell you're trying to hide it

True put I just fake smile so people will leave me alone

That makes sense.

I just down-right tell people to leave me alone

That won’t work for me