Hey, my girlfriend and I of over a year just broke up. At first I had hopes I could just be friends with her for a while, and show her how good we could be together. I've kind of learned that's not really what she wanted and it's not the best thing for both of us.
Sometimes being in such a close relationship can stunt your growth and become entirely different than what a relationship is supposed to to - encourage growth. My suggestions are that you try a little seperation. In the meantime, you can contact each other and basically be friends, but just that. Keep the time with each other to a minimum and keep away from anything physical, no matter how much you both might want to hold each other. It might feel better for a while, but in the end it hurts more.
Take a month or so off of being together and meet some new people. Talk to your friends, go out on dates, and basically expand your life and learn about other people. I just got done with talking to my dad, and it really helped a lot. Talking to other people about it is probably the best thing you can do. In the end, if it's meant to be, both of you will return to each other with a better view of life, which is always a good thing. Good luck, and remember there's a lot more out there than you realize.