that is my problem. if he does exist and i don't believe, i'm pretty much screwd

i can't believe in something simply on faith but there's always that question in the back of my head "what if i'm wrong?" what if out of the 2 choises i'm on the wrong side?and by wrong i mean that he does exist and, according to the bible, i go to hell. but thats the thing with faith, you either have it or you don't. and i don't. and i can't really see that ever changing.
that's what i hate about religion. i have to burn in eternal fire or whatever happens in hell just because i don't believe in something that i believe to be unlikely. the way i see it, the ancient greeks believed in zeus and the the other gods and lived their lives in fear of them but that didn't make it true.
i think the bible was written so that people had something to fear when considering doing something morally wrong. they wanted people to consider the consiquences.
but again, there's always that voice in my head.
i really would like to believe but every time i have these unanswered question:
-lets say u believe but a member of your family doesnt. that means they're going to hell. how can u love a god that will put that family member through eternal agony?
-how can God allow all the crimes, rapes, torture, famine, etc to happen?
-how can God allow the other 77% of people that aren't christians to go to hell? i mean, seriously, what are the chances that a person born in a mulim, buddhist, hindu, etc. country, is going to be a christian. it's how u are brought up. i'm guessing most christians, had they been born in japan, would be buddhists.
-why should i go to hell even if i'm a good person just because i dont believe in God?i could go and confess in a church but whats the point of confessing sins, going to church if i dont genuinely believe?
the other thing i don't like is that:
- all people sin. how is a christian better than me?
let me give you an example: at work, they hire a hot new secretary. there are 2 guys working there also. one christian the other not.i can guarrantee that both of them will have sinfull thoughts:) so the christian guy goes to church the next sunday and confesses. all is forgiven! it doesn't matter that the other guy realises afterwards that it was wrong to have such thoughts and is sorry.
same thing for hitting, killing, stealing etc.
they both do the same thing, they are both sorry, but one is damned for eternity and one is eternally happy or whatever.
so in conclusion i'm here,as most of you are, to see if anybody can answer my questions
i'm all ears:)