I don't agree with GradeA*UnderA, I'm afraid.
I suppose you could categorize arousal under the 'sexual feeling' umbrella, but choose not too.
I think of 'sexual feeling' as more psychological, it's an urge, a drive, a need, an innate mental feeling. It entertains the brain, brings up sexual thoughts and fantasies.. its responsible for the temptation and excitement of sex.
But I feel that 'arousal' is physical, its involuntary and bodily-controlled, rather than exists in the brain.
I identify as asexual, and do feel aroused. However I do not feel a driving need or any emotional feeling attached to that arousal. To me, they are entirely separate.
This makes 'faking it' (which I do to somewhat entertain my partner) incredibly easy to turn off. My partner is often overcome by his psychological urges for sex and strongly feels intense mental attractions to the sexual feeling. I cannot relate to this at all.
However you feel, Anon, don't be discouraged! Sex is weird and the human mind is weird and behaviorisms and psychology are weird. With time, your thoughts towards this will become clearer,
Keep on living it out and you'll find your niché