Well you said you're only "seeing" this guy so clearly he (or maybe you?) isn't interested in going out with you.
The fact he's being aggressive with you when you're trying to tell him that you're not into that, points to only one thing: he enjoys disrespecting you.
Now, ok in a proper serious relationship or when it's been made clear that you want him to treat you like that, it doesn't necessarily mean that outside of the bedroom, he disrespects you but here, unfortunately, how he treats you in the bedroom does sound like the way he perceives you outside.
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