awww baby! yea i read a little bit in your journal- i'm so sorry
but like other people said, try to focus on yourself for a bit, relax and go out with friends and things like that. One thing i find really helps is to write a letter to him but don't give it to him kind of thing- where you just get all your hurt and anger out- as if you were talking to him.
Also, I found this visualization trick to really help too. Focus on a situation where things were really good between you guys and then try to look at the situation from another perspective- another person watching you so to speak. Then, try to drain all the color out of the picture, with only black and white shading (its hard to do- but it helps) this visualization exercise helps to seperate you from the situation and then to look at it from another perspective so you can begin to disassociate yourself from those feelings. Also, try to do the exercise with a situation where things were bad too because when its all over, its easier to focus on when things were good so you miss him, but focusing on when things weren't so good and then distancing yourself from it helps too.
i hope it helps but time will pass and things will be ok... keep your head up girl
~maggie