How do I slow down a fast relationship?

I adore my boyfriend... I really do. However, I want to enjoy the relationship and not have it burn out quickly. I really want to slow myself down and not get caught up in an infatuated haze. My boyfriend agrees and is open to a lot of things I suggest. I take lead in most situations, but I'm completely lost. We have heavy makeout sessions...that are good.. But I want to stop that, until a later time. What are some suggestions ladies? What can I say to him?