oh for christs sakes, 15 is not too young. i lost my virginity at 14 to a 19 yo. don't regret it one bit. many people are sexually active in their teens and should be allowed to be. some teens are more mature than others and require older company. i have NEVER liked males my age. always preferred older and maturer and those men were NOT deviant.
unfortunately for original poster, you risk this young man's life if you pursue him. he will be branded a pedophile and will be put on that horrid list for 'deviants'. he'll have trouble finding work and his friends will leave him, his family will be ashamed etc etc etc.
your parents and the law will unlikely understand and treat you as a child who does not know her own mind and has been manipulated by the older person. it is unfortunate that the courts do not recognise genuine affection. i think it is wrong, but i can't change this. so many people have a knee jerk reaction to age gaps. so it is with much distaste that i have to agree with the other posters and say 'don't do it', but for more realistic reasons. there is still time for love.