If you already consider gambling as food for you than mostly your fully addicted to gambling. As you said gambling should be for pleasure, but pleasure shouldn't be a full of life. Apart from pleasure there many other things to do in life so you should go for fun only sometimes but not every day. Learn to control yourself and gamble vocationally.
A gambler is really addicted in gambling if he treats gambling as his food for his living. But naturally gambling is addicting it's the normal way on how gambling works, how the games are exciting, on how it is letting us experience to win small and big money. And on how you are losing that affects your emotion to revenge for the money you lose.