sad and shocked

i finally finished reading harry potter and the half blood prince. yayyy!!!mission accomplished for this holiday. but i was so sad and so shocked, albus dumbledore, the head master of hogwarts died. and bloody snape killed him. he used the most powerful curse on him. how can dumbledore die?there is still another book. i couldn't believe my eyes when i read it. so sad!!now mggonagall will be head mistress. the question is, will harry return to hogwarts?will he die?someone who has read deathly hallows please tell me. then only i will read for myself. i want to prepare myself.huhu