He talks bad about me to a girl but he still asks to hang out with me? why?

Tryna make it short okay.
Anyway Hey I’m 18F and I’ve been talking to a guy 18M for a while. We’ve hung out many times and done dirty stuff. The last two times he was the one to ask to hang out with me and he even missed school to be with me. We snap each other and I sent a picture of me wearing a top (didn’t reveal much) then he saves it and shows it to one of his female friends and says that I’m weird. (He’s always talking about me with that girl I feel). He says that you don’t send that kind of picture to a friend randomly. The picture was blurred due to water in my camera. Before I even sent pictures of me where you could see my boobs a bit but bro didn’t save those ones.

Why does he talk bad about me but still asks to hang out? Is it to boost his ego when I ignore him?
He talks bad about me to a girl but he still asks to hang out with me? why?
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