I need answers please?

so i have been a relationship for almost 2 years. and my boyfriend had brought up that he wants to have a three sum. or that someone to use me sexually. i want to experience a three sum kind of. but him saying that he wants someone to use me kind of puts me off. he just doesn’t understand that im not ready for that kind of stuff just yet. so what should i do? should i stop being difficult and just try it? or how do i explain to him that im just not ready yet. without him getting mad at me for not being ready? so now he is mad at me because I don’t want to go meet up with a guy and have sex with him so he’s punishing me by not talking to me for a week because I was jealous the other day because he was talking to a hooker while she was flirting. so now im not sure to do.
I need answers please?
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