Abby,
I have similar feelings. My wife Ada fought LC for over two years. They were tough years for her - several surgeries, multiple chemo combinations, radiation, etc. - we researched doctors and treatments together. We traveled from Georgia to Pittsburgh and then to Nashville. I look back and I feel bad that she had to go through that. But as bad as it was, I cherish those times together and would love to still be fighting this desease with her. She would tell me that even though she had cancer, that no matter what happens these were most happy years of her life. It was because we together constantly for those years and months. It has been 7 months since I lost her and I often think how much I would like to still be be going with her to chemo or CT scans, or whatever - just so we could be together again. I know that I will never really get over this loss - I will always have sad moments when I think of how hard she fought and moment of realization when she new she wasn't going to beat the cancer. But it will get better- I notice that there seems to be more time in between the sad moments. I assume that that will continue. I don't mean to ramble - I don't post often. My wife was very active on the board - I was mostly an observer here. But reading your post got me started for some reason. Good luck to you - what you are feeling must be very normal. Everyone deals with this in different ways - so none can tell you exactly how to grieve or how to recover. I just know you will.
Jim