When it comes to mental health, I usually don't buy into media products. For example, when I was picked on in grade school, I would roll my eyes whenever my mom started a conversation with, "You know what I read in a psychology book today about bullies?" I DO think that more upbeat music and some comedic movies couldn't hurt. And a lot of times they CAN help you escape, but for a more effective and stronger remedy, I'd have someone to talk to. If you are in a relationship, then talk to your partner as much as possible, at the same time letting them know you need some positive reinforcement. If you are not in a relationship, and don't have the energy to start one, then find anyone else that you can trust to talk to on a regular basis. As far as I know, positive human interaction is your best bet.
Good luck!
P.S. Even though I don't think I'm sufferring as badly, I am going through the EXACT same thing, sometimes even comparing myself to my girlfriend! We should both take Sannah's advice, lol.