I am most definitely NOT asexual, but my sex drive has changed dramatically since an year and a half ago. Changes in my physical health have affected my libido (sex drive), but it hasn't disappeared either.
Years ago, I happened to know a few people who identified as asexual (clients in my former career of hairdressing), who definitely had the sweetest disposition and personality. They just weren't interested in the sexual component of romantic relationship and would sometimes bring up the piece about how frustrating it was for them to date, when dating can mean an plethora of other things that they never found interesting.
So in some small way now, I now better understand their frustration as people who identify as asexual.
Although I'm not asexual by any means, I know that changes in my physical health has impacted my sex drive. Sex can be enjoyable, but it's not something that drives my universe anymore.