I think talking about it with family, friend, or a professional is the first and maybe only way to work through these kind of internal issues. Perhaps also writing out your thoughts in a journal will help too? I think writing down a problem can help because once you put it in words it becomes data and not emotion. It's very hard to come up with a solution to your own problem when you're drowning in the emotions that problem is causing. my 2p.
I listen to Lana Del Rey... it makes me think of a lot of things... it makes me reflect on my life and then i realize that other people are going through tougher situations than i am. And then I paint lol....
I used to feel that i was dead inside as well, so what i did i tried to find out what was the root of the problems for me to feel like that and once i found it i tackled it head on. I was sexually abused when i was a child the left me so insecure, ashamed, disgusted of myself because it happened 7 years later i managed to come to terms that it wasn't my fault and i couldn't be blamed for it so i forgave myself and now i feel amazing. So what suggest to you is to find whats bothering you and try to work through it with someone x if you need to vent anything out i am here for you :) i hope that I've helped x
The first thing you should do, go outside your house, move your body, go by bike or go somewhere up a hill or so. This will lighten up your mood, at least a bit!! (I hope I found the right English words to express what I mean)