Bittersweetness is an emotional state that combines feelings of happiness and sadness simultaneously. It often arises in situations where a positive experience is tinged with a sense of loss or longing. For example, graduating from school can evoke joy for achievements while also bringing sadness about leaving friends behind. This complex emotion is commonly found in art, literature, and music, where creators express the duality of human experiences. Songs like Eric Clapton's "Tears in Heaven" or novels such as F. Scott Fitzgerald's "The Great Gatsby" capture this feeling, illustrating how moments of joy can coexist with underlying sorrow.