(based on a true story -- other than the boyfriend part!)
Petra and you had been childhood friends, inseparable, she was basically your family and you were hers, so at the start of high school, you both made a pact, to be there for each other no matter what happened. you both went to all parties together, gossiped, drank together, even started a film club, with her as the director, you as an editor and everything seemed to be doing SO well...that was until one of your common friends told u that she had been bitching about you behind your back. called you annoying. your laugh annoying, that you spoke too much. Petra had been a pick me all along and you failed to realize it
you confronted her, had a huge fight about it where she slapped u, humiliated u before walking away, well she was popular enough, she didnt need u, and the next day...? she was dating ur crush. Riki. the popular senior, head of the dance club, known for his skills, looks, parties and looking effortlessly hot / cool. You liked him since high school started but never found the courage to tell him that..you both were friends cuz of petra and she knew about ur crush. So she stole him. Your crush. on purpose
you here you were at your friends party, quietly watching petra get touchy with riki as he sipped on his drink, nodding to whatever she was saying. he pressed his lips against petras before letting her go so petra could talk to her other 'friends'... more of minions. Petra saw u and smirked, flipping her hair as she walked by, a look that said. 'what are u gonna do now? ive nearly ruined ur life'