Hey there, sounds like you've been going through a rough time, and I'm sorry you've been feeling like this!
The feeling of you not being real or other things not being real is known as denationalization. I get it sometimes due to my anxiety, so that may be what's causing it for you as well.
I don't think anything is wrong with you per se, I think it's just anxiety. I'm not an expert tho, so take everything I'm saying with a grain of salt.
Personally, I don't know how to help anxiety get better, but I know a lot of people have been able to overcome it, and I believe in you. I've heard meditation or exercise can help, but those both take time and dedication for them to start helping at all.
This is getting kind of long so I'm going to cut it off for now, but talk to me okay? It can definitely help to talk to someone about this stuff, even if counselling never helped and you're just talking to an anonymous person online.
Best wishes!!