honestly a pretty depressing song that I listened to at the worst point of my life, but now when I listen to it- it makes me feel really appreciative of how far I've come!!! ^-^
i find songs that sound "alone" (not necessarily lonely in a melancholic way [at least to me] but those ones can also be good if i'm in the mental space for it) comforting. ambient stuff, usually from video games, like:
also for ones that aren't exactly what i said above: