i want "me" back

For the last six months of 06', i really found myself being such a stupid and useless person.I did a lot of stupid things and decisions.Until now,it is still bothering me, never miss.i suffered a lot.I don't know what am i doing ?I have been such a person even me also cant recognised myself.I dunno what am i doing...i really hope that all these never happen before.I wanna find myself back who is cheerful all the time but not keep bothered with same thing again and again.I want me to be someone who can make a decision very fast, i will not care how people look at me .I want to be a naughty gal as last time. I want the true "me" back!! i know it cant be happen anymore, cuz i have grow older day by day.:(