>> This. I seem to still have erotic feelings from time to time, but I rarely feel the *need* to do anything about them.<<

That is often described as "gray-asexual."

>> Or my body is driving the need, but my brain is still kind of "meh" about it. <<

O_O That really sucks. Sometimes masturbation will make it go away, occasionally herbs or meditation will help, but other times the only solution is to have sex you don't really want to make your bits stop bothering you.