Full unmotivation

I guess a lot of people are like me. 

Like, I used to be full of ambition and I wanted to do so many things as a grown up; I wanted to Be a musician, a writress, a singer. I even admired people who didn't know what they wanted to become as I thought it was nice to just have to choose between so many fields. Well I was so wrong lmao. That's not fun. 

Now, I have no idea of what i want to do later. I still love singing, playing music, but ngl, I'm not that good at it and worst, I never felt so unmotivated, so I guess I can't make it my job. Everybody who lives thanks to music are passionate people who work their ass off, who practice a looooot Etc. But for me, I take my guitar and 5 minutes later, Im so unmotivated that I can't memorize a single thing of what I'm trying to learn. Everytime I discover something, I got addicted to it for like 2-3 weeks, but then it fades away and never comes back. 

And it's tiring. Lol, I guess there are worst problems in life but still. Everybody around me has their dreams and is working hard (very hard) for it (friends who want to become doctors who study like hell, another who wants to become an artist who also studies her art more than ever and so on) and on the other hand, there's me. Not doing anything, not fighting for anything. Not wishing* to fight for anything. 

Is there anybody who feels like that? Or better, is there anyone who ever felt like that but who eventually '' got better''? What happened? Can you still feel that fucking lost for years or is there a specific moment when everything finally makes sense? 

Probably a very long message, but I' ve been bothered by that numbness for way too long now so..