Do heaven or hell really exists?

Don't worry too much about that. Your opinion is what matters most. If you believe that they exist then they exist; no matter what the other might say about this.

I think it depends on how religious you are and what your religions beliefs are twards Heaven & or Hell. I'm not really religious (I was not raised in a religious home) so I am somewhat skeptical of any of the things religion tells people to believe. The only thing I can say is the 10 commandments is something worth living by beyond that it's up to you to believe in your faith or not.

Everyone has there own opinion on if there really is a heaven or hell. I am not a very religious person, but I do believe in heaven, and I also believe in hell. I guess the best place for you to start is the Holy Bible, read it and maybe you will have answers come your way, or just pray a little bit. The only one who can really decide this for you is well... you.