The first thing you should do is find out what caused these feeling in the first place. I'm far from an expert, but feeling like people are far away sounds like dissociation to me. I'm not saying it's dissociative disorder. Dissociation can also be a symptom of anxiety or depression. You should also consider therapy. If you have, I hope you find help soon. :)
I'm going through the same I except, Imy thinking and imagining death is so terrefiying
The best thing for you to do is to see a psychiatrist and I think that will help provide some insight to what you may be going through.