About Suicide?

Okay, I want to know if it's possible to think about suicide without being suicidal? Like if you think, what would happen if you committed suicide?or, how would I do it? or, who will miss you? or, where will I go afterward? I think about death too. Is this normal. No, I haven't have a recent death in my family or anything. However, I have been feeling really depressed lately. Are these suicidal thoughts? I don't believe I'm suicidal though. Only crazy and severly depressed people are suicidal right?