Thank you all so much for all your responses, they've been so helpful and quite honestly comforting to hear.
I guess I'll give a brief update. We had been casually talking for the past month, but you could tell there was an obvious discomfort because we didn't really know how to handle things. I had been praying constantly trying to figure out how to settle things and kind of just feel a little more at peace with everything especially if I was planning on serving a mission soon, I really just wanted to get these feelings handled before I left.
It's funny how the Lord works sometimes. A few days ago I decided to talk to him like some of you had suggested. I had this whole outline in my head like 'its okay and we can still be friends, this shouldn't be as awkward as it is, we can still email each other, etc.' That never happened. We ended up talking about how we had felt about each other during our relationship. Once again we really refrained from getting too emotional during our relationship so this was really different. I think just hearing how much he cared for me was enough to give me a bit of peace as I still young and feel pretty self conscious about things like that. We ended doing what I thought would have been the worst case scenario, but I think now it was for the best. I think as we talked we both knew why we really needed to break up before the mission. When we started dating we didn't plan on breaking up and his parents dated throughout each other's missions so I just hoped it could be the same. I won't mention his reason for needing to end things, but as for me, I think I just became a little too dependent on him making me happy. My mood just revolved around him and that's not healthy for a mission. We decided it was best not to text much before we leave and we also decided not to email. This would have been the end of the world to me a month ago, but honestly I'm relieved. It's funny I guess because my biggest fear was losing my best friend and cutting him off feels like I'm doing exactly that, but for some reason I feels like the right thing at this time. He's still my best friend, and we are going back to the same school when we get back so this obviously isn't the end (of our friendship at least). I really don't know where it's headed but once again I really appreciate all the responses, they helped me sort out my feelings quite a bit.
On a sidenote, my mission call came in a few days ago!!!