Even a happy life cannot be without a measure of darkness, and the word happy would lose its meaning if it were not balanced by sadness. It is far better to take things as they come along with patience and equanimity.
Basics about Happiness
What is happiness? Is it just the absence of pain and problems? Is happiness a goal that I can reach and what do I have to do in order to get there? Or is happiness just something that one may experience and in the moment when I start thinking about it then it disappeared already?