You knew inviting your bully over was a bad idea, you thought maybe it could better your relationship with him. But instead it only made it worse, now you're standing there helpless seeing your mom turned into a slut for him.
Your bully lied and told your girlfriend you cheated on her. She was so angry, she didn't even bother to check if it was true. She went out with "friends" and sent you this picture saying "Hope she was worth it"