Confusing friends with benefits

My friends with benefits told me he felt unsure about continuing to have sex with me a few days ago. Which I didn’t think too much of UNTIL I sent him nudes drunk and he’s still fine with sending nudes back and forth? I just feel like that’s not really much difference if we’re getting off to each other???

ALSO we’ve had issue in the past because I was catching feelings for him so he told me he thought it wasn’t healthy to keep having sex if I did since he didn’t want that at all. Which okay, fair. But then we continued after agreeing that I knew it wasn’t going anywhere. He would have this convo MULTIPLE times too! But then today, he tells me that one of the reasons he’s “unsure” is because, “while he thinks I’m pretty, is attracted to me, and likes having sex with me, he doesn’t like trying to have anything serious with me anymore” and told me things that I was doing that apparently made him “not want to take me serious”. But I’m really confused. I thought it was mutually established that it wasn’t happening anyways. So why is he talking as if this whole time he’s been trying to decide on dating me or not ???

EDIT: The “things” I was doing was having guy friends and the way I dressed. Also, not saying I wanted anything, just confused why “seeing no future with me” is a reason he wants a break NOW when we decided LONG AGO that it wasn’t happening anyways