-in fanfics.-
Girl can socialize fine, cuts herself and tries to kill herself.-

Either that or she's just super shy.

No. That's not social anxiety. That's called the author being ignorant.
There's a difference between just being shy, and having social anxiety.
Like, you are panicking in the halls and shit.

Real social anxiety: (AKA me)

Me: -is texting friend.-
-says something.-

Friend: Ok.

Brain: WTF DID YOU DO, TURN ON THE FUCKING ALARM!!! LET'S REEVALUATE WHAT WE SAID AND OVERTHINK IT WAY TOO MUCH!!! DID WE OFFEND THEM!!!!!????

---

Mom: Just TALK TO SOMEONE!!!

Me: THAT'S LIKE ASKING SOMEONE WHO IS DEATHLY AFRAID OF ROLLOR COASTERS TO RIDE THE FASTEST ONE AT THE PARK, IT'S NOT THAT SIMPLE!!!

---

Me: -tells a joke.-

-.... No one laughs.-

Brain: -chanting.- DEATHDEATHDEATHDEATHDEATHDEATHDEATH!!!

--

Me: -is talking to someone.-

Brain: Omg wtf ru saying, ur a fckn idiot.