story time(how i got cheated on)

so my boyfriend of 2 years on halloween cheated on me multiple times. i continue to take him back because i love him so much, he just turned 18 in february keep in mind. HE CHEATED ON ME WITH 28-50 yos. many many times it’s just so heartbreaking. i feel like im not good enough and i just cant leave i feel so stupid. he lives over an hour and a half away, and when we went to his prom as i was driving to spend those 3 nights he was on ft w a bih. most of em knew ab me to which is the disgusting thing. what happened to girls stand up for girls like what. how would you feel if it was your man? AND.. i had no idea about this app til this is where he met one of the bihs on. any advice? we just got into an argument as im writing this.