Your feelings are not perverted, but, acting on those feelings would be wrong.
Look at it like theft. You can go by a bakery and think to yourself that it smells delicious, but if you go in and take something without permission, then you have broken the law.
Age of consent laws are for the protection of youth, so people won’t take advantage of their vulnerability.
Each state has their own impression of when a young woman is old enough to make those choices for herself. It might seem confusing, but one great thing about our country is that there are many things which are decided state by state.
So, if you really like someone who is fifteen, feeling that way is okay, and telling them is okay, but trying to advance things while they are so young is wrong.
I am glad you asked this question, because so many people get to feeling crappy about something which is really not so dreadful as what they might believe.