CBT or DBT therapy might help if you can find that near you, medication can also cause you to feel "dead" or dissociation/de-realization too, if that feeling has come on a lot more lately talk to your Doctor or psychiatrist or therapist and get them to get you ona new medication or a lower dose, it is a really distracting feeling and is hard to enjoy things when you feel like that all the time or hard to tell what is even real or not.
I go through moments of depression and anxiety, it's been not as bad lately but therapy and techniques help me get through certain times I feel like I'd do something I might regret, there are millions of people out there that go through it all, I don't think you're attention seeking just reaching out for some help or advice, some people will try to shut you down or shun you or compare your mental health issues to theirs but non of that matters, don't hesitate to see a psychiatrist, mention that feeling and when it came on or when it comes and goes and all that and hopefully they can help with a different medication and some techniques to help with lowering that feeling or frequency of it.
Good luck, keep your head up and stay strong Greg.