You are the only one who can determine whether a 7 year age difference is too young for you.
You are the only one who gets to physically and psychologically experience what it is like when you are around her.
If you are normally overwhelmed with a sense of discomfort due to the age difference, this is something that you have to take into considerable account.
If the common interests and core values that you both share are suddenly forgotten in these moments, this 7 year age difference may be a major problem for you and something that could truly impede you from being yourself whenever you are interacting with her.
If you try to build a sort of friendship with her in the hopes that you can make a move on her after she finishes college and is a little bit older, you may end up becoming a friend to her and nothing more.
If you actually want her, you should go for her wholeheartedly. If you don’t, someone else will and you will lose your opportunity.