hi april:) sadness and happiness, these are all emotions. Emotions are changing every moment of our lives. It's okay to feel sad. The fact that you are acknowledging such is admirable. :) This only means that you are vulnerable, and being vulnerable doesn't make us less as a person. I actually see it as drawing us closer to God even more.
In one of my favorite books, Strong women, soft hearts, It was said that God wants our hearts more than anything else, and vulnerability means that we are actually trusting God that He will take every inch of our concerns.
:)