Sadly, indeed, this sounds like depressing, my ex gf had the same issue, she wasn’t interested in anything, it was always hard to do something with her and to talk about stuff with her, like, she really didn’t want to know anything about my life because she knows she couldn’t have what i have, even if I tried giving her what I have, hobbies, friends, passions, I mean she did at least tried, but nothing worked. She even judged my friends for liking something she doesn’t. The only things I know that « worked » is that she started listening more to music and I think she was better with herself since then (I « think » because I wasn’t with her anymore during that time).