Cheated again??

Is this cheating?

So my boyfriend added some girl on snap and I was fine with it because he doesn’t have much girls who r friends and I would like him to instead of it seeming like I don’t want him to talk to any girls

But than this girl sent him a picture of her vagina and he said he never saw it but he obviously lied about that and than I saw screenshots of the convo that I got from the girl cause my boyfriend unsaved the messages she sent me w screen record of her convo w him and it’s him basically say how he wants to video chat on Snapchat and do stuff with her like touching themselves on snap

And he said he only said that cause he thought I was catfishing him cause he thinks I’m that shallow to do that even tho I told him a million times it’s not me

(I haven’t catfished him in the past but ig he thought I was cause I caught him cheating me on once like this cause he said yes to fuck some girl on Instagram)

Is it cheating??