Pinksxace's "Fake a smile" is about the gap between how a person looks and how they feel inside. The speaker asks, almost like a challenge, "Can you see my smile?" and then admits right away that it is fake and never was real. That honesty is the heart of the poem.
What comes through most is exhaustion and longing. The speaker keeps trying to make the smile real, but feels stuck in a loop: they would need to be happy first, and they would need a life worth smiling about. The quoted line, "where can I find one," sounds like a joke, yet the speaker admits it is also true, which makes the humour feel sad and a little bitter.
The ending is short and quiet. The smile hides "the real you," then, more personally, "the real me." The mood is lonely and vulnerable, as if the speaker is finally letting someone see behind the mask.