Music is art. It's meant to speak to us. Sometimes it expresses feelings we are having difficulty clarifying. When this happens to me, I keep listening until I understand what this music is trying to communicate to me. It can be very healing. At any rate, if it's what you need right now, why not? It makes you sad? What if these feelings of sadness have been supressed by you and subconsciously you know you need to get them out? What if it gets you in touch with yourself. Let the music do what it's meant to do for you. I'm sure the artist would be gratified to know it touched your life in this way. When the song has done what it's there to do, you'll listen to something else.