I understand completely Alnun. I have also suffered depression, and my main reasons for fasting now are the same, breaking the comfort eating habit I've been in since 2000 when I first had to leave a long term job due to stress then in 2004 when my second wife left me- at first with both our children. All this time and especially since the breakup the overeating has just been constant. I have faced down my Depression before this but the immediate stresses all these years have been quite a drain. I am not exactly seeking happiness through the fasting, but definitely relief from the comfort eating and craving the wrong foods- which is of course a double edged sword because it is completely out of control and just leaves me feeling helpless.
I think you have a great attitude and are responding to your body's and your mind's progress through your fast exceptionably well. Good luck keeping going with your fasting and healing!