Am I taking up his time unnecessarily?

I’m looking for an unbiased opinion. So, I'm a 20-year-old female and he’s a 21-year-old male; we’ve been high school friends. We spent the first two years of our relationship together, but the last two years have been more on and off. Now, things are getting serious again, and we’ve talked about intimacy. He often asks when we will take that step, but I’m not ready for it. Just to clarify, I haven't had any sexual experience, and I don’t have any trauma; it’s just where I am right now. I’m hesitant to share this with him because I really value our relationship and I’m afraid of losing him. He’s a wonderful person, but I worry that he might want more than I can give.