Sandbar; this exact question has been discussed multiple times in this thread by multiple people with some very good, insightful, and fair posts. Some have even had good articles and videos included that gave a lot more input than we can give here. I have given thoughts on this before as well but I will give a quick version of my take.
I hope others don't just think what I think. I am a fallen human with many errors and flaws and I am not the moral arbiter of the universe, nor do I have the power to decide if anyone goes to Heaven or Hell. What is in my human heart is greed, lust, envy, pride, ungratefulness, and countless other detestable traits. I am unworthy of Heaven simply because of these traits. Would other people want someone like me in Heaven? I doubt it; not with those traits. Now I like to think I also have some wonderful traits as well but unfortunately my bad ones stain my good ones and overpower them. If there is indeed a Heaven, I am only getting there by someone giving me forgiveness and reconciliation that I cannot earn and do not deserve. I think the evidence is very good that such a being exists and that there is a way for me to accept that forgiveness but I do have to be willing to accept my flaws and try to follow the one who has given that path. We all have choices to make; we can choose to believe what we want and follow who or what we want; that is free will. But God wants us to love Him and that must be freely given as well. If we choose that we do not want to be with God then He will not force us to be with Him and he will allow us to be seperated from Him; even forever. That is what Hell is; permenant separation from Him and all of his attributes.