There is always a reason to why we feel a certain way.
Sometimes we do not express it because we are afraid to meet it face to face, we are scared of confronting the mere thing that makes us weak.

Other times,
We do not because we get too comfortable in our sadness, we become too familiar playing the victim

But regardless of what we choose it eats us up like how a leech nibbles on flesh and without expression your heart can never recover .