Sometimes the smiles hide the pain, hurt and disappointments.
It is okay like that, not everybody has to know what you are going through. The good news is that there is Someone who can look beyond the smiles and see your pain. Even before you tell Him, He knows, Yes, He knows. Prayer does not inform God of what He does not know, but it expresses your desires, and gives Him permission to act on your behalf. Have a blessed day!