A lot of pain seems to come from a poor vocabulary about feelings. What is boring? It's a weak and flattened word like the feelings it's used about.
Do you mean avolition, acedia, irascibility, dissatisfaction, insensibility, repression, discouragement, ambivalence, anxiety? The Psychology of the Emotions by Neal Burton is a fair place to continue the introspective journey you've started [1].
> I lost my creativity and the sense of wonder I used to have in childhood. I am no longer curious because I am settled for the world as it is. I accept things the way they are instead of imagining how they could be.
Comfortably Numb. There's a dose of it going around. Don't worry it's an acute condition. All progress depends upon the unreasonable man. You need to stop being reasonable. Take a good look at the world, and notice there's still plenty to be really, healthily angry about, and so much to be joyously in love with. Just don't give in to ambivalence or settle for the illusion of comfort and safety life seems to be showing you. Take a risk on it.
[1] https://www.psychologytoday.com/us/blog/hide-and-seek/201601...