Sabrosa literally means "tasty" or "flavorful," often used for food. However, in a colloquial context, especially in Caribbean Spanish and vallenato music like this song, it can also mean "delightful," "enjoyable," or even "sexy" when referring to a person or a situation.
In the lyrics, "Pero qué cosa tan sabrosa," it's used to express a feeling of great enjoyment and pleasure, almost like savoring a delicious moment. It's an interesting word because it bridges the literal sense of taste with a broader sense of delight and appreciation for life or a person.
"Ya No Me Duele Más" is Silvestre Dangond's declaration that heartbreak has finally loosened its grip. He tells someone to pass along the news to his ex: he's healed, he doesn't cry over her anymore, and he's learned his lesson about not chasing an illusion that only brings suffering.
There's no bitterness in it. He wishes her well, admits she may have loved him more than he loved her, and credits the whole experience with making him stronger. The chorus keeps circling back to the same relief: it doesn't hurt anymore, he's already let her go, and wondering why anyone should keep grieving when life just keeps moving.
By the end he's telling her to go her own way, because everything changes starting today — a clean, confident goodbye rather than an angry one.