I’d second what nunchucks said. Cut as an adult with maybe an inch of inner foreskin left and I’d say the sensitivity is within 90% of what it was before. Once lubed up and hard it really is hard (no pun intended) for me to feel any loss in sensitivity. I think it’s mostly a change of sensation rather than sensitivity. You do lose the gliding motion, but for me at least having a stretched skin when hard feels amazing and I prefer it over having that mobility in my foreskin.
Leaving the physical aspect aside, I think this is very much a psychological matter. Sex is better now because I feel more confident, I love the looks and general feel of the bare head, my girlfriend prefers it like this (and she got to experience me both before and after) and it is cleaner now, regardless of how well I washed it before, and I like feeling clean.
I wouldn’t say just go and get circumcised, but I’d say that there is hardly anything to worry about on the physical side of it and your ability to enjoy sex afterwars, assuming you go to a competent surgeon. I feel like the psychological side of it plays the biggest part here. It is a compex decision and it is permanent once you make it. If you truly feel like you’d be happier with your penis if you get circumcised, then I’d say go for it. If you have your doubts, maybe give it more time. But make sure that whatever you decide, it is what makes you happiest and do not worry too much about loss of sensitivity - as I said, you’d be hard pressed to tell the difference with a medium/high circumcision. My only regret is not doing it earlier as I waited worrying about loss of sensation, even though I have never really felt good about having a foreskin.
In my opinion most criticism of circumcision is not as a result of the procedure itself or its outcome - the vast majority of men who had it as adults are happy with it. It is mostly as a result of the opposition to RIC, which I understand. However it is very easy for someone to take psychological distress and a general feeling of betrayal due to not having a say in it and start making up stuff about how mutilating the surgery is and how your penis is numbed by it. I empathise with men in this position, but I think it does no one any good if we start alleging that circumcision ruins sex, especially when you lack the counterfactual experience to make that claim. For one, it makes men circumcised at birth feel physically mutilated when they really shouldn’t (I won’t argue with the psychological impact of it, I think the matter is still ethically challenging). In addition it deters adult men from seeking a procedure they would have otherwise liked to have, and it prevents them from feeling better about their bodies at virtually no physical cost.