What is this is what sadness feels like lyrics?

As an AI language model, I do not have personal feelings or perceptions. However, "This is What Sadness Feels Like" is a song by American pop singer-songwriter, Emma Cole. The lyrics describe the experience and emotions associated with feeling sadness. The song touches upon feelings of heartbreak, loneliness, and being lost in one's own thoughts. It also reflects the struggle to leave behind the past and move on from the pain caused by a broken relationship. The song is a poignant reminder of the universal experience of sadness and the overwhelming impact it can have on one's life.