Y’know, the Declaration of Independence

posits that we have a right to the "pursuit of happiness."  Not its achievement.

I tend to believe that the misunderstanding of this clause is a major problem with most Americans. 

There is no right to "be" happy.  You don’t "deserve" happiness; you deserve the opportunity to pursue it as you wish.  If you don’t get it, you don’t get it; pursue it some other way or give up the pursuit as you wish.  That’s your right.

Happiness is a result.  You have a right to try for it.  It is not owed to you.