My first girlfriend who i thought was the love of my life of three years cheated on me

Ive been dating her since i was 15 and she said shes taking a break to focus on herself and i tried to be the better person and understand the decision since we’re young and building our careers and life but yet begged herr for daysss to come back and recently found out shes just been cheating on me and she has been talking to so so many guys

she was literally like my everything i dont have alot of friends im bad at studies and im bad at everything and its like the one good thing in my life is gone and i know alot of people are gonnaa say there’s much more to life but my little life for now is fucked up and i dont have the strength to go through this even if its cowardly i justt dont im so pathetic and nothing ever EVER works out for me…ive had cuts all over my wrists but now im seriously considering ending everything