Hey! I had the same sort of thing after moving back from university. A strange sense of detachment from my memories and experiences. I felt numb. I went to the doctor and he gave me anti-depressants. They made me into a ghost. I felt nothing. It was a flatline all the time. I stopped taking them. I decided that I'd rather have the peaks and troughs as oppose to nothing. I'm 26 now and I wouldn't say I'm depressed. I can be happy sometimes but the feeling never leaves me. It's as if I'm always thinking the worst. I think it's to do with my stammer/general anxiety but I'm not sure yet. I know it can get better. I've been there and I lost it all. I've got a good job now and neglected my social life so I'm kinda stuck. That probably didn't help at all but I read your post and if you ever need a chat, you can message me. I'm from London, hey! ☺️