Wanting to be more rough in bed

So, my boyfriend is the first man I've ever had sex with. We have sex fairly often and its always good, and he knows I like when hes rougher. I like it when he chokes me and pulls my hair and fucks hard but I want to do more and i dont know how to go about telling him that and I am so inexperienced that I dont really know what else to try, I want more I'm just not sure what. Hes used restraints on me before and I liked them but I wanted them to be more. . . Restraining than the were (if that makes sense). Can I get some advice or things to try?