I'm not sure how to describe what I'm experiencing. I feel like I no longer have any hobbies or interests. Nothing is stimulating enough to override my desire to avoid mental effort. I remember when I was younger, I would be engrossed by various topics. I'd spend hours researching some arcane subject (computer networking, electronics, etc), and it was enjoyable to me. I used to be so bored at school, but I'd look forward to getting home. I'd have the rest of the night to pursue my own interests.
I'm not sure what has changed, but I don't have this desire anymore. Almost nothing is interesting enough to motivate me. I avoid anything that requires sustained mental effort. Most things are too challenging, and I can't focus. If I need to do something that requires prolonged concentration, my brain can't handle it. I feel like my mind is saying, "Stop. This is too exhausting, difficult, overwhelming, and complicated." When I'm not working, I do almost nothing productive (listen to music and watch TV). That's all that I can handle. When I try to accomplish something, it tends to be incomplete and go unfinished. I occasionally have some enthusiasm (at least initially), but my follow-through is poor.
Internally, I feel very sad. I have goals and ambitions, but I've realized that I'll never accomplish any of them.
Can anyone relate? What could cause me to become like this?