Being married does not mean that there will be no more tears, and you will be happy all the time. Hard times will still come, and you will still walk through valleys together. But when you go through the valleys together, the burdens are so much easier to bear as you bear them together, and you can support each other and lift each other up through all the trials. This is one of the great joys to sharing every part of life together.
The true secret to "happily ever after" is not that the trials are gone, but that having someone who loves you through them all makes every trial so much easier, and brings joy in the midst of it all.