Contentment vs. Happiness

Is it ok to just be content in life? I mean should I be satisfied that I am just content with my life, but not truly happy? And if this is ok, how many others out there feel the same way? Or, does happiness become contentment? Do the things that make us happy at first only make us content later? I cannot help but wonder if that is being caused by our ever increasing need for instant gratification as a society? We as a people now want everything yesterday, and as soon as something bigger, better, faster comes along we want that instead. Is it possible that way of thinking has begun to take over the very way we measure happiness? And if so, should we be ok with that? What are your thoughts?