How old is too old?
Whoa! An 11-year difference? One or two
years is fine for someone your age, but a guy that old dating someone
your age is eyebrow-raising at best and law-breaking at worst.
Depending on the state, it's illegal for a person 18 years or
older to be involved with a person younger than 18.
Legal issues aside, it also raises another question: Why isn't he dating a girl his own age? That seems pretty strange in my opinion. Think about it, girlie, when you get to be his age, would you ever consider being with somebody 11 years younger if you didn't have some creepy ulterior motive in mind?
Not only is it odd and illegal, but a lot of things change the situation when a person is that much older than you. He will undoubtedly expect a lot of you at some point, perhaps more than you're ready to give. Though he may not pressure you for it, he very well might.