somethings missing

I've always had this feeling in me where something is missing. Even when I'm feeling good and happy I stop myself and wonder what the hell is missing and why can't I fully enjoy this? This happens most of the time, not all the time.

Lately, that feeling is immovable from my concious mind. I noticed it on Tuesday when I was playing basketball and my usually clear mind had something in the back burning at me. That burning sensation in the back of my mind is like a headache. Not that it's fundamentally painful but I'm always mindful of it and it can dominate my thoughts.

I don't know how to shake it because it's always been there and I don't know what to do make it go away...

Am I the only one like this? And even if I wasn't, I don't know if that would make me feel any better... But then again who does misery looooooovvvvvveeeeeee????