Ive been dating a person that is 19 and im 15. Is it illegal?
If he was forty and you were ten it would be legal (but that is horrible Im not condoning that!)aslong as you dont have sex.If you two do have sex he will be done for statory rape and im sure you dont want that for boyfriend so just dont be tempted and you two will be fine :)
It is not illegal to go out regularly with someone, which is what dating is, regardless of the age difference. What is illegal is if one is a minor/below the age of consent and there is intimacy. Intimacy may just be considered kissing. In most of Europe the age of consent is 16 and below 18 a minor. What the situation is in the US seems to rather depend on the laws of the State in question. At 15, intimacy would clearly be considered illegal.