need help ladies

so me and my boyfriend (i’m 16 he’s 17) have been together a year and a half. i caught him a couple times in the beginning with flirting and complimenting other girls but i haven’t looked through his phone in probably a year just because i don’t know if i want to find anything. are there any girls that would be willing to add his snapchat and see if my intuition is right?

i would just ask him but even when i literally caught him he was still trying to deny it as best as he could so i know if it’s something i don’t already have proof of, he’s not going to tell the truth, that’s just how he is.