I think that for some of us, there are things that seem unobtainable or 'what other people do, not me' and it is by a circuitous route we end up doing those things ourselves. If possibly you are or have been affected by that feeling, occasionally, you have probably nibbled off a bit more at a time until here you are, all but solo. The nibbling is a sort of self-kidology but works; I'm not sure I could do that but there's nothing to stop me just going with an instructor for fun... and one does and it works and you try another bit and so on.
In this case I think you could combine everything said in posts above with another nibble. What's the worst that can happen? Not a lot, actually. You'll be fine. It may or may not be the best landing you've ever made but it'll be a good safe flight because that's why you are training and how you are turning out to fly. I had the approach that I wasn't actually bothered about going solo in anything. If you get on well with your instructor (and you must do, by now), relay any genuine fears and trust his or her judgement.
Enjoy your flying.
