why we do what we do

I used to be a happy go lucky person, always ready to take on life ...these last few months have left me totally shocked and removed from my own world...life could catapult into such a violent ride...i had never even thought in my wildest of dreams...but this is here to stay now i guess.
what is it that makes us want what we want and then repent later that we ever wanted it, is it only me that thinks so or are there others. There are times when u r jus crazy, madly in luv ready to die for that one thing that u want from life, but wat if u die while getting it, what then...i dont knw.
Why is it that when we dream we dream about our life and how people surround it and come into it, but when the lifes of people whom we care about are on a low side we are the ones most affected, why is it so difficult to dettach from things, to leave everything on its own...how ever hard we may try wats to happen will happen, or are we the guiding forces in our lives...so many questions...n jus few months ago i had all the answers, i was a go getter. But today no answers i get jus a void inside me, i m going on because there's no way out. My soul is lost somewhere, maybe in the lives of people around me, searching for answers who's questions i never asked before.
Yet no answers i get jus a complete void, m trying to grasp out to a support but when i turn bac i see ppl clinging on to me, how can i let go then, how can i ask for support...