I have a friend who started dating a girl when she was a freshman and he was a senior, and it is a little odd at first, but only assholes really make a fuss about that stuff, especially if it's committed relationship. Some of them are ehhhhhh(cuz, ya know older person taking advantage of younger person...sexually), but in a relationship between two respectable individuals committed to one another, age should not matter..unless..ya know...one of them's liek 6 or something. Then there might be an issue.