Lol, i don't understand why most are always bothered with the age difference. What does it matter?
In my opinion, the only thing one should be bothered with is that she is still a minor.
After she is 18 (or 20) there shouldn't be any problem with a romantically relationship between those two.
There a woman who are attracted to older men, and there are men who are attracted to older woman, in the end it is just personal preference, as long as both concerned parties are "adults".