Without infinite wisdom to back me up, I would say that you have to talk things over and decide what his expectations are and what you feel comfortable in doing. There are so many different things you could do but to try to tell you what, I believe, one would actually have to be inside yours and your boyfriend's mind.

Talk things over, see what you are comfortable with, experiment, take it slow, and see what develops. Ask questions. Does he want to be restrained? Does he want to be teased? Does he want to be spanked? What does he want and what can you do and feel comfortable in doing?

I know there are others here who will have better advise but just thought I'd give you my opinion.