Pleasure is gratification that only lasts for a short time. It is tied in with our survival instinct. The things we need to do to survive, have sex/procreate and eat are designed to give us fleeting pleasure not lasting happiness.
If sex and eating provided lasting happiness then we would probably only need to do them once which would not guarantee our species survival.
The way to prolong pleasure is to anticipate it, savour it and then remember it. As someone who is someone addicted to the pleasure food brings, I don't take full advantage of enjoying the pleasure.
Today I will eat mindfully, I will plan and look forward to my food. I will eat slowly without any distractions savouring every bite, and then I will remember the sensations and feelings of pleasure after they have gone.
No matter how much food I eat, the pleasure will always fade. I cannot obtain lasting happiness from eating. Happiness does not come from pleasure. It comes from achieving my purpose in life. One of my purposes in life is to be as fit and healthy as I can be. I will not let my pursuit of pleasure undermine my happiness.
It doesn't matter what my mind tells me, I am much more than my thoughts. I will identify all my thoughts and desires before I act on them, in the same way I dismiss acting on inappropriate sexual desire. I am not obliged to follow what my mind wants. I will switch it off and find happiness in the stillness of just being me.
Pleasure is not happiness.