Sounds like you are infatuated and do not want to share her with others until the infatuation wears off. Not that unusual. If you keep doing this, you will probably get a lot more realistic about what is going on and stop feeling that way. In the meantime, doing a review destroys the romantic illusion you have about her, and with that you want to go elsewhere and find that illusion again.
Pretty natural. But your attitude will evolve as you continue. Can't think of why you would want to change that until and unless it happens naturally. Have fun and roll with it.
There are reasons why you should review after the first date (that is what people want to know, not how she is on the third or some other later date), and reasons why it might be helpful to you to review after the first date (writing your review and reading the reviews of others would help to remind you that this is P4P, she is not "yours" in any sense whether you review her or not). Eventually you would get used to it and stop having this concern that reviews turn you off to the provider. But the best reason not to review after the first date is simply that you prefer not to, and that should, win out.
Personally, back when I reviewed a lot, I enjoyed reliving the many delightful moments. I did not consider at all that anyone else would be reading what I was writing. I did understand it might help the lady, and I liked that - the idea of helping her. Back then, I also found it a little uncomfortable to read other reviews about a lady I was seeing - if she did exactly the same things for another guy, it bothered me, and if she did more for him than me it bothered me even more (I always assumed those reviews were true for some reason, silly as that is).
I still mostly avoid reviews these days, but only because so many of them are beyond boring. Now I get it that any lady I see is doing the exact same things for at least 10 other guys every week, and that there probably is not much that differentiates me from any of them as far as she is concerned. This turns out to be liberating and opens the door for a lot more honesty, maybe even creating some basis for something that is like a friendship, but it still is P4P, first and foremost. Still, there are benefits to losing those romantic illusions.
When I write a review and say I plan to see the lady again, often I actually do not plan to see her again. What I really mean is that she delivered a very good time, was clearly worth what I paid, and I have zero regrets about seeing her. To actually go back and see her again means there was some spark or connection that I want to explore again, while saying that in a review means something more along the lines of there being no reason to not see her again. That spark or connection is a highly personal thing, and while I suggest it in my review when it is there for me, I do not include it in the scores or the overview because I doubt it means much to anyone else, and it would result in me downgrading women who are very good providers just because we did not get along as well as I do with others.
Anyway, I would not worry about saying you would see someone again and then not going back. Nor would I worry much about seeing a lady two or three times and then moving on. Sometimes it is just a brief infatuation with a pretty and willing woman, and it wears off quickly. Sometimes she gave it her best shot the first time and after that she lets up, or it just gets repetitive and boring. Happens all the time, so move on without any concern. And if you should choose never to write reviews, that is okay, too.
You are here to have fun. Ladies would prefer a nice, happy, clean, prompt and well-paying client to just about anything else, even if you only visit her once and/or never write a review. So do what you want to do.
But, as I said at the beginning, I think you are working through some other feelings about the ladies you see, feelings that are not directly related to reviews. Eventually you will quit or get past that.
zig