We recently asked the BuzzFeed Community to tell us about the worst things teen drama characters did to each other. Here are some of the biggest betrayals:
Warning: Spoilers ahead!!!
Note: Some of the following contain mentions of eating disorders and sexual assault.
1. First, when Paige tried to drown Emily on Pretty Little Liars:

2. When Kitty purposefully sized down Marley's costume, which led her to develop an eating disorder, on Glee:

3. When Joey cheated on Caitlin with Tessa and got the latter pregnant on Degrassi: School's Out:

4. When Julie slept with her teenage daughter's ex-boyfriend on The O.C.:

5. When Serena filmed a sex tape of her and Dan without his consent to get back at Blair on Gossip Girl:

6. When Lucas cheated on Brooke with her best friend twice on One Tree Hill:

7. When all of Annie's friends dropped her because they thought she slept with Liam on 90210:

8. When Rachel cheated on Finn because he slept with Santana before they were even together on Glee:

9. When Adrianna swapped Silver's bipolar medication out with placebos to get revenge on her for hooking up with Navid on 90210:

10. When Hope put Josie and Lizzie in danger in an attempt to save Landon again on Legacies:

11. When Scott believed Theo's story about Stiles purposefully killing Donovan on Teen Wolf:

12. When Toby worked with the A Team and let Spencer think he was dead on Pretty Little Liars:

13. When Betty and Archie kissed and had an emotional affair behind Jughead and Veronica's backs on Riverdale:

14. When Agnes and her friends drugged Jenny and left her at a bar on Gossip Girl:

15. When Rachel sent the new girl to a crack house instead of telling her where the auditions were on Glee:

16. When Chuck angrily punched the glass behind Blair and it left a cut on her face on Gossip Girl:

17. When Charlotte trapped the Liars in the dollhouse and tortured them on Pretty Little Liars:

18. When nobody believed Ryan that Oliver was dangerous on The O.C.:

19. When Jughead faked his death and nobody told his father and sister about the plan until later on Riverdale:

20. When Miles asked Winston to lie on the stand at Zoë's trial so Maya wouldn't find out he almost cheated on her on Degrassi: The Next Generation:

21. When Kelly and Dylan went behind Brenda's back on Beverly Hills, 90210:

22. When Tristan mocked Miles's sexuality in front of the entire school because he was mad at him for flirting with a girl on Degrassi: Next Class:

23. And finally, when Clarke killed Bellamy over a sketchbook on The 100:

Got a teen show betrayal that didn't make this list? Tell us in the comments!
Reminder that I, Kelly Martinez, do not necessarily endorse all of these submissions!
Note: Submissions have been edited for length and/or clarity. Not all submissions were from Community users.