When I am in the mood to sulk, I usually start listening to some dance music or cheesy electro and cook a variety of food. Put Tiga's 'Sexor' or some LCD Soundsystem or Junior Senior on really loud, make up a pot of soup, some muffins, maybe a curry, and invite friends to help you eat it. There is no staying sad when you do that.
I know how you're feeling; I still can't listen to some of my old favourite albums, and hearing songs from them hurts. This too shall pass, but it is fortunate that there is a lot of good music in this world 'cause I am here to tell you the depressing news: you might not enjoy those albums as much as you did ever again. Explore everything else though!