bf and snap

my bfs phone is always blowing up from instagram and snapchat and we’ve been best friends on snapchat for two months bc you get a dif emoji and last night i noticed it was gone and i don’t have a new best friend. clearly he does. i asked him about it he freaked out as always because whenever i ask him who he’s talking about he gets mad because i don’t “trust” him but the reason i don’t is because of the way he reacts to things and doesn’t post me on the two socials he’s on the most and gets messages the most. it makes me really mad he has a new bf on snap and won’t tell me who it is. is this wrong of me?