So my boyfriend and I have been dating for a while and I already jacked him off a few times and now we are thinking about having sex. I'm up for it and so is he, but due to my past, I'm not exactly sure if I'll still want it while it's happening. I'm afraid I'll chicken out like 5 minutes in. So since I realize that this may be an outcome, I'm wondering if I really am ready. How do I know for sure?