It really depends on how strongly you feel about each other. I know people who have gone out for a very long time before going off to college and they broke up because of the distance. I know other people who are living extremely far away and stay together. If you are having doubts about it now, I would think that it would be pretty difficult. The age difference would normally not be a problem but in this case, you will be experiencing things that she has no idea about and you two will be on different levels.
