Lovejava,
I experienced people acting horrified over my sister's suicide too. In fact, that was one of the most difficult things for me to deal with. I remember the day I told my current therapist what had happened. She just stared at me with her mouth agape, totally speechless. (I never went back to her).
Everytime I brought up my sister's suicide to my ex, he changed the subject. Actually, outside of my family there isn't a single person I can talk with about my sister's death, and it is not because of my uncomfortability with it, but theirs! I don't know why, but this really hurts me.