Marchitar means "to wither" or "to fade," often used for plants or flowers. It's a poignant and evocative verb that paints a vivid picture of decay and loss.
In the song, Aitana asks, "¿Cuántas rosas vas a marchitar?" (How many roses are you going to wither?). She uses this metaphor to express the emotional damage and pain caused by a failing relationship, likening her love and hope to roses that are slowly dying due to her partner's actions.
"SI NO VAS A VOLVER" ("If You Are Not Coming Back") is Aitana's account of finally admitting a relationship is over. She opens by confessing she's spent all her energy loving someone more while saying she loves them less, and describes a heart tired of pretending it had already moved on.
The chorus asks the questions anyone leaving a long relationship asks themselves: how do I make a reason to call you, to see you, when I know I won't have you again? She's tired of loving someone who isn't coming back.
The second verse turns to the damage they caused each other, a garden they grew from jealousy instead of trust, and a moment where she gave everything (heaven) and got only heartbreak (rain) in return. By the end, the repeated line "Si no vas a volver" becomes less a question and more an acceptance: if you're not coming back, she's ready to let go.