why?

Sigh.. I wish i studied harder. The pain of regret is killing.. Although i did my best then, it still wasn't enough.. No where to go now.. I feel lost again.. The first people who said will be there for me are the first to run away when i was in need.. And it hurts.. Is it this difficult for me to do something right for once in my life? I want to do well in my studies.. But no matter how much i try, it's never enough.. I need a miracle!!