Have you looked at Depersonalization? http://en.wikipedia.org/wiki/Depersonalization_disorder I don't know if that's what you're feeling, but it's worth a try. :)

It's okay to be in a different world. Accept that feeling. Drink a glass of water, stretch your back, smile. There, there, Indigo. You're fine. Now go for a walk in the glorious spring weather (it's glorious here, at least).

Are you sure this is a bad thing? I would want to know about what led up to this. If you have had a stable, healthy ego in the past, it's possible that you've just "outgrown" that kind of relationship to self, and haven't yet completed the transition to the "next level" developmentally. On the other hand, if you never really liked your "old self" all that much, you could be headed into a personality disorder that requires professional treatment. There's really two different kinds of "self" available to human beings: ego is the kind that we're mostly talking about and referring to when we say "myself" -- it's the conditioned / habitual structure of personality formed by mental habits and beliefs about ourselves and life. This structure develops and evolves over the course of a normal life, becoming more mature with time. The other kind of self isn't like ego at all: it's the "ground of being" for our existence -- a formless "space" in which our lives happen, which is most readily recognizable as the simple ability to be aware and respond to life. This kind of self doesn't develop or change over time, it's like the container in which everything else happens. Coming to recognize this kind of self is an important developmental stage which many people never quite get to. So there's not enough information in your question to pin it down, but I suspect that you're either (a) suffering from some (possibly mild) personality disorder or (b) starting to question the solidity and authenticity of your own ego-based sense of self. The latter is actually quite healthy and possibly the precursor to a significant breakthrough in self-understanding. The former calls for a therapist.

i would recommend therapy.... not psychiatrist, but a therapist.