What to do what to do

When u are told ur so tight an rt after they say I love you. I'm not into saying it back. This one guys said this then I found out he is all about wanting to work things out. I'm not sure I'm into saying I love you. I have said it during sex but no more. I found out this same person loves when I bite him. He loves it but won't do it back. I want him to so bad but don't know how to tell him an not sound like do it or we r done. I love roughness during sex. All the men I'm with want to treat me like a queen an not hurt me. But I want to fell pain so how do you or would u tell ur man?