Can't Let Go Of Hope

My boyfriend of just over a year broke up with me 6 weeks ago completely out of the blue! We are both 21 and had a pretty serious relationship and practically lived together for 6 monhs of it. To me our relationship was perfect! He was my best friend and I loved him more than anything. We would argue occasionally, but no more than most couples. We shared interests, had a very similar sense of humour, and generally just got on amazingly!
Anyway, he broke up with me because he said he didnt want a relationship right now! He feels he is very young and he has been struggling with work etc. at the moment and just wants time to concentrate on himself and get his life in order. He has had quite a dramtic family life and has always had to look out for others, so i think he worries about having to think about me all the time as well! He loves me very much and I know thats true, he says he would love it if things could work out in the future but cant guarantee what will happen, and doesnt want me to put my life on hold for him. The thing is, i want to wait, because as crazy as it may sound at 21, I do feel like he is my soulmate! I just know he wont be ready for a serious commitment for a long time. He says if its meant to be it will be and we just need to let time run its course! Buy im a very impatient person! Im struggling with the thought that things will maybe never work out and because of that am finding it hard to accept that this IS a break up! On top of that, a lot has happened in the time since we broke up and i think i may have pushed him away by not being able to let go. I dont know if its too late for us.
I just need help letting go and letting the future be what it will be! At the moment i am waiting for the day to come when we get back together, which is only a possibility, not a fact!