非常郁闷- no offer yet

I have been looking for jobs for a couple of months now. I did get quite some interviews: first rounds, final ones, onsite. Unfortunately, still no offer.
Everytime when I got called for interview, I became hopeful and thought things are not that bad yet. But since no offer yet, I feel my spirits were over drained. I feel terrible at night. In the daytime, I can control myself better.

I really don't understand why still no offer : (