I think humans are more than our physical bodies, so we don't just stop existing when the body dies....what happens to our non-physical aspect exactly I am not entirely sure, maybe it varies greatly who knows. But I have no definite sort of belief as to what might come after this life.

I have been suicidal many times, but never saw suicide as a way to get to a 'better' existence quicker really, more as 'I feel absolutely terrible most of the time, am in pain/misery and can't take it anymore' sort of thinking.