Why can't I enjoy anything? Everything I do, I'm always so bored

I try to play the guitar... I get bored. I listen to music.. get bored after a while. Try to watch a movie? Same thing. Reading? Same. And so on...
It seems like I just get bored of EVERYTHING after a short period of time. Sometimes there's something that grabs me so much that I become obsessed with it (in this period I'm obsessed with online reviews, for some reason) until I'm fed up with it and move one onto the next thing.
I just don't know what to do anymore.. it's ruining almost every aspect of my life, I'm desperate

No one knows what to do with this.. even my therapist keeps saying "You just gotta find something you like!" But HOW do you do that?

She's so useless..
I'm sorry for the vent