It seems that trying to find peace and happiness totally negates it. The more you look for it, the more it evades you.
You may find it in fleeting moments, and it's these moments that we chase, hoping that the next one will last forever.
When you have worked hard, and achieved the goal that you set out to achieve, and you finally reach the climax, the peace and happiness is there. But then when you start to look more intently and the happiness, at the current state of things you start to see that something is still missing...
It is not complete. Now that you have achieved it, you experience the satisfaction of what you were looking for but there are still holes in it as you start to experience the moment more and more. And so the next pursuit begins with the same consequences.
It is very important to realise that you will never find total peace and total happiness in this word. That deep desire you have, you're not going to find it here...
I'm not being cynical, these are just the facts. But the beautiful irony is that once you have made peace with that fact, you stop chasing it. And once you stop chasing it, you find it.
What you are seeking is not to be found in this world. It lies completely beyond this world. And you already have it in that world. It is already totally at your disposal.
We put of happiness and peace to the next moment, next achievement and next relationship. You disallow yourself happiness until you have reached the goals you set for yourself without realising that you already had it all along.
Try this: Acknowledge that life is going to disappoint you. God might disappoint you. You will experience pain and setbacks. Life is not against you, it is teaching you to let go of what you think you want so that you may take hold of what you already have.
Stop seeking it "in this life" and realise it has already taken hold of you in the more real and tangible spiritual life.