Here's 238 words. You could drop a few choice adjectives back in to give it more of your voice, and smooth it over. 
When ELIZABETH GRAYSON meets CHRIS EDWARDS on the first day of school, she believes he's her soul mate. For seventeen-year-old Liz, the deeper connection she feels for Chris becomes complete when they fall in love.
Then too-perfect MINA MANSON appears and immediately sets her sights on Chris. Liz resents this and Mina's disdain. At least Chris remains loyal, and indifferent to Mina.
Liz meets with the new counselor, JEWELS, to discuss Chris—and Mina's interference. They discuss the possibility that Liz, Chris, and Mina knew each other in a previous life. Liz researches the notion online and comes across old news photos closely resembling her, Chris and Mina. Based on the articles with the photos, the consequences of their past life connections were deadly: (insert actual crime here). Liz confides her fears to Chris, but he's too rational to buy reincarnation, instead interpreting her actions as jealousy.
Mina, who knows even more about the three's past, manipulates him into breaking up with Liz. When all three attend a Halloween party, a costumed Liz records Mina admitting to her past life's crimes. Liz plays the recording to Chris in Mina's presence, and despite Mina's denial, he sees through her lies and asks Liz to forgive him. Before Chris and Liz leave together, Mina grabs Liz's hair and threatens her.
Mina leaves school. Chris accepts his shared history with Liz, and presents her with a ring representing their eternal love.