What else is there? If you believe everything was created by the material world then those feelings you get are nothing more than electrochemical responses in your brain.
And again- you have no idea what I crave- you imagine you know what I crave- based upon your own personal experiences- but you have no way of knowing what I crave.
As far as things incapable of satisfying us- again speak for yourself. Many things satisfy me- from drinking the perfect pour of beer, smelling a wonderful rose, a glorious sunrise, seeing my child take her first step, seeing her graduate.
And as far as feelings being nothing more than electrochemical responses- well that is really what they are. As is- in my opinion- your belief in some diety.
I dropped acid one time. And I saw God. Truly I saw God while I was on acid- and then when I came down I realized it was just a boy with a boogy board.
Our brains are electrochemical machines- incredible electrochemical machines- that are affected by drugs and hormones and blood sugar and blood flow- I can marvel at our amazing brains without needing to give credit to some unseen hidden hand.