Help?

So I need some help. My boyfriend is a dominant and I like being choked and held down but I’m so terrified of letting his go further with me as I’m still a virgin. I know it sounds daft but I’m petrified of going further then dry jumping and that and I can tell he’s getting frustrated and he’s trying his hardest to be gentle and not get mad but I want to do other stuff with his but I’m too scared. Any help?