My time in college and the years immediately following were dark for me, as well. Peter Gabriel's duet with Kate Bush, Don't Give Up, was one of my coping songs. It's one of the few songs that explicitly try to comfort without coming off as cheesy or treacly. At least to me.
And so it fits now, too. Thankfully, blessedly, my connections to family and friends are stronger this time around. There are people I can fall back on. That river's flowing.