evil straight woman lies and friendship cheats on me with rando boy

The only person ive had a semi-coversation with this year is my estranged friend girl. we have known each other for like four years now but we kind of drifted last year because all my friends just stopped talking to me for some reason when we got to high school but i genuinely thought it could be mended this year. i tried to have a conversation with her again but she was all awkward and i could tell she didnt gaf at all so i shut up. then, on my way to the bus last week after school, i spot her with a group of people and shes laughing and stuff and shes also holding some rando guys hand. i can tell immediately that it must be some friend group because they all look like surface level weirdos just like her and theyre all having the time of their lives. then to my surprise, the self proclaimed lesbian of like 3 yrs now leans in to kiss that guy on the mouth, instantly shattering my heart into a million pieces inside my chest. it is even more infuriating to know that shes only known this guy since this year so for like 2 months, not even. now every day when i have to go home im forced to be friendship cucked by this random boy on my way to my bus. i hope god just strikes me with lightening on my way home today and kills me instantly because i do not want to see that disgusting shit.