I know exactly what you are going through as I am in the middle of ending a long term relationship myself. For obvious reasons, this is an extremely difficult time and I have been searching for help and advice all over the net. Something I found that was helpful was this discussion...http://www.pandalous.com/nodes/2b1e794701df445180baa0f5bd6a28a7
It helped me come to terms with the fact that though I care about my boyfriend dearly I need to move on in order to be happy. Hopefully it can do the same for you. Good luck!