I suggest you to take a cruise trip with her for a week or so to a tropical place. Cruising is very relaxing, creates a lot opportunity to reconnect to your girlfriend. It is incredibly romantic. You will regain the passion & intimacy. My question is are you willing to try?

This usually happens when one of you in a relationship has cheated and for the one who has been cheated on he/she find it hard to trust again and he/she find everything not the same and that lead to not being attracted to each other anymore

But as you say you've spend seven years together I think it just that you both so use to each other but am sure if you both really love each other you can find a way to make thing work again, does she still feel anything you do to her or not? If not you need to sit down and talk to each other find what makes her happy and let her know what makes you happy and you can start it from there.

Remember communication is the best thing in a relationship, also spend lots of time together alone am sure that can help!

If you need to have a sexual attraction in your relationship, then I would say it's time for you to move on. Life is too short to wait for someone to change.