Why?

I read this somewhere and it seemed to describe how I feel,

Recently I've been feeling a little under whelmed with things in general. Disconnected. Floating head syndrome. Not unpleasant, not pleasant. Just dead. Grey. Flat.

I don’t want to feel like this, but nothing seems to shake it off. Sometimes I don’t know why I bother - but at the same time I do know, but just don’t know why I bother sometimes..