i have feelings for an older guy

im a young girl who is under 18, and i am infatuated with a man who is 9 years older than me. i spend all my time with him and i believe he feels the same way. i know im too you g to know what love is but im currently very confused. i dont think it is wrong because my father is married to a woman 11 years younger than him. does anyone have any advice for my situation?