I was just in a similar situation. I felt like things were not how I actually wanted and it was painful to be in the relationship, but just as painful to think about breaking up.
Try to get a general sense of how things are going. That is, the way in which you communicate and develop as a couple. Is this difficult time just from the natural ups and downs of a relationship, or is there some fundamental personality trait that is going to be causing friction for a very long time?
If you can look at things like that, maybe you can get a better idea of whether this is something you want to work through, or if you'd rather work on getting over this love you have. Just see if you can spot light at the end of the tunnel, or if you'll be going down a very rough and painful path.