aio that my boyfriend has 3 girls pinned on snapchat

am i overreacting by breaking up with him over this??

i feel like a total idiot. i don’t have snapchat, so i would have no idea how much he snaps people or anything. i ended up breaking up with him after arguing on the phone for hours. him telling me “you don’t have snap so how would you be able to understand?” and gaslighting me into thinking i’m the wrong one. i don’t even know why he would text me that and the screenshot in the first place. i refuse to be “the other girl”, and that’s what this feels like.

we are broken up right now, but if it is determined that i have reacted harshly, i will apologize and etc. i’m just so hurt right now and i’m literally seeing red.

thanks for any and all thoughts. i really appreciate it!