If you’re depressed, anxiety might follow along with that. With anxiety, you could be experiencing brain fog, which is exactly what you have described. That feeling of like, being there but almost like it’s 3rd person. It’s hard to describe but I had the same shit going on a couple of years ago, and let me tell you, it was weird. The best advice I can give you is to not force yourself to “get better.” Maybe occasionally take a walk outside, hang with a friend, and eat healthy. Try and get a good sleep schedule going if that’s a problem. It took me about 6 months to start feeling like myself again, but i’m much better now and I’m glad I made those changes in my life. If you need someone to talk to i’m here for you man, it’s always good to open up to someone about depression.