Just turned 14, a previous primary school friend transferred to my highschool. Spent the first three days talking about herself and she was someone i absolutely wanted nothing to do with. Underage drinking, smoking, trying drugs, underage sex, and quite nasty. She must have sensed my unease, as from day 3 onwards, she started bullying me, really badly, to the point it was day in day out relentless, at school and being told all about the stuff they were saying about me to each other out of school etc. It got to the point i had no friends, was majorly suicidal and had to drop out of school which due to the sudden disappearance of all routine, caused a pre existing anxiety disorder and depression to spiral out of control, and to this day it's never stopped. I became housebound, unable to finish school, never mind college or uni, never been able to work. It completely destroyed my life and 13 years on, i'm still exisiting rather than living.
My "If i could go back" was a week or two after the bullying started, as the fat, nerdy unpopular kid who was ridiculously shy, i asked my best friend if she would just stand with me and back me up if i confronted the girl and told her to stop, only wanting the friend to say she agreed the way she was treating me was wrong, but my "friend" refused, and went on to stand by and watch and laugh along with what followed for the next 14 months until i dropped out because i broke, told my parents i was walking in front of cars every day on my way to school hoping to get hit.
I wish so, so much, i'd just had the courage to stand up for myself even if i was doing it alone, even if i got a physical beating (her abuse was all verbal) maybe, just maybe i could have stopped her. Especially as an online confrontation at 18 she admitted to me i never did anything wrong, she just thought it was fun to see how far she had to push me to react, and if i'd stood up to her she would have stopped. I followed the advice everyone always gives, ignore them and they'll get bored and stop. It only spurred her on to more extreme things (like telling the entire gym changing room of half the girls in my whole year that i was a lesbian mid changing) to try to make me react, and it very nearly killed me, and then destroyed my life.