Is this 'flirting' or 'picking on her'

This is a conversation that was had between a friend and 2 other guys.. They're not fighting.. They dont hate each other.. shes NOT ugly lol
-Thanks for answering in advance

Boy 1
Shut uo teagan
Boy 2
Hahahaha tegan hahahahaha that was...

hilarious.
Girl
why you so quiet for aye??
Girl
Wtf.. As if it sounded like teagan! Who was it that even said that?
Boy 1
Shut ups you stinks
Girl
Your so mean
Boy 1
Well I'm as mean as you are ugly :p
Girl
Really?.. I thought you said I had the good genes? Hahaa
Boy 2
Ahahah damn I love you ars. I can just imagine mez's imitation of tegan's voice haha.
Boy 1
Yeah you have the good genes, just shows how ugly sarah is
Girl
Hahaa.. Is that sarcasm?? And fk off with the teagan! pat your just as mean!.
Boy 2
Wait up im still looking for my calender, im gonan remember this day, the day you actually talked to me.
Girl
Sooo meann! I've talked to you before..havent I?? :s
Boy 2
No I've been do your house multiple times. I even chilled in your room with everyone. Remember mark kept looking at your pictures that you had hanging up?

I tihnk you're the mean one. You bully.
Girl
Ohh yehh.. That ugly picturee :s
Geez why do you have to remmeber so much! Haha
me! The bully! - teagan..teagan..stop talking teagan
Boy 1
Shut up teagan you stinks
Girl
Fk off already! Your dp looks nothing like you btw..
Boy 2
Unfortunately yours looks identical to you tho
Boy 1
Lol!

…etc…

I have no idea

Hmmm