My best friend commited suicide?

my best friend commited suicide i dont know how to feel i'm lost..how could i havent seen this comming? he was totally normal and didn't seem depressed at all :S I feel angry but sad but more angry than anything, i asked this already but i feel panicky i dont know if i even want to go to his funeral but i think his parents might be upset if i dont since they asked me to be a pallbearer