She is Jasmine and you call her Jas because she is your best friend and when you introduced her to your boyfriend Justin and suddenly they were the ones hanging out together and you were just a ghost you were mad and wishing that you didn't introduced her to him and they were in a empty room and you we're just passing by and you saw them they were so close to each other and you saw them

Kissing Jasmine was on the table while Justin was kissing her they didn't notice you so you left crying