Oh good grief, my heart goes out to you, Godsgirl! I've been where you are, and I know how horrible it can feel. I remember distinctly laying on my livingroom floor, bawling like a baby after breaking off an engagement. I also remember just pleading over and over "God, please don't leave me... please don't leave me alone."
My situation was a bit unique, in that I had to break the relationship because it was taking me down a bad path. Depression, self-centeredness, and I was wandering away from my faith. It was at that very moment, as I cried out to God that he threw me on my face, and convicted me of my sins. I confessed them to him, one after another, repeating and re-asserting my conviction that I am nothing without Jesus.
I cried for a long time that day, but I'll tell you as I continued to pray and seek God's grace, my tears turned to praise. I opened to the psalms and read some of the praise and thanksgiving psalms aloud, and after a while I felt a little better. At least the tears stopped.
It's a hard thing to end a relationship we thought we'd have for a lifetime. But there's one relationship we'll have longer than our lifetime, and a relationship which will not, even cannot, end.
I got through my time of troubles with God's help. Our Father coddled me like a baby, and He helped heal the hurt. Without Him I'm convinced I probably would have done something drastic. Thank God that He was there in my time of need. Indeed, is always there in all our times of need.
I hope this helps a bit, if only to reassure you that you're not the only one who's had to go through something like that. I'm sure your situation is different from my own was, (and not just because I'm a guy. :wink
but God is eternal and he will be our rock when the storm is threatening to blow us away.