Oh I think I know the feeling. I feel that all my life. Feeling like I just don't belong anywhere, I'm just kind of drifting and floating around and finding nowhere I'd want to be landing on. There's always something else I'd rather be doing, somewhere else I'd rather be... the worst part is realising my powerlessness to change that.

That could be anxiety, as kecanoe suggested. Lately I've been putting that down to anxiety too, after researching and reading other people's accounts of their journeys through anxiety and depression.

Anyway, I'm seeking help now and hopefully I'll manage to live with the feeling better than before. And I hope you can find help, too.