Hopeful, I am sorry you are feeling this way. It seems to me that you have lost a little bit of your edge throughout all this. Have you forgotten about yourself? Your qualities? The kind of person you are and the things you really want out of him? It's as if you are deciding how your day is going to be depending on how he treated you the night before or in the morning... I am not saying that you should give up, but your approach doesn't seem to be getting the results you hope and deserve.
If I can give you any advice (and I am great at giving sound avice but don't follow them myself) is, do not call him while he is gone. When he comes back, I would be less available, more busy with other areas of your life.
Give yourself scores from 1 to 10 for the following areas of your life (1 being the lowest and 10 the highest): health, work/studies, family, friends, social life, dreams, love life, spirituality; than go work on the areas that are receiving the least attention. It seems like love life has 2,000 points...
