Can't Fool Me

Sadness engulfs me and I don't know why,
I'm surrounded by people but I feel lonely. 
I find myself putting a smile on my face to hide my true feelings.
I fool those around me,  they don't know my suffering.
I walk past a crowd of people with my head held high,  holding back the tears that are starting to sting my eyes.
I may fool them,  but I can't fool myself.
The sadness engulfs me.