I feel for ya, dude. I went low-carb and low-cal today, not because I'm cutting, but because my pants were starting to feel tight and I decided to implement a control day every week to ensure that I can keep bulking without buying new clothes
Anyway, it made me remember how much happier I am when bulking and how unhappy dieting makes me. Like you, I really feel the hunger: stomach feels empty, I feel light and energised, and I salivate a lot. But the feeling of emptiness inside my stomach is the worst. I'm looking into metamucil for my planned V-diet come May to keep myself full.
On the bright side, the extra energy is pretty cool, and you probably get used to the void in your stomach eventually. Good luck.