"yeah, i'm a christian. i totally believe that jesus was the son of a god, he died for my sins, resurrected and went to heaven, because bible tells me so. but certain other passages in the bible must not to be taken too seriously because bible is all symbolic'n shit...you know"

makes totally sense. in other words: i believe what i want to believe and i want to believe what is most comfortable for me.

puny human beings...

That's the ideea.
You belive in something that let you trust your own ideeas , and not just listen to everything.
Some people just took Bible way too serious,even christians and atheist.

no atheist has ever taken the bible too serious. but you're totally missing my point!

there are two ways:
1) you are a believer and believe, what your scripture says or
2) you're NOT a believer.

in believing you cant be half-something. you either believe or you dont!
there actually IS a way around but it's still not a religious way. a person can be somewhat christian (or moslem or jewish or buddhist etc) without believing into that supernatural BS but the he has to admit, that hes just a philosophical believer, i.e. he finds the ideas of this or that teachings to be good to follow and thats pretty much it. but the he can also NEVER say that "im a crhristian but i dont believe in the creation story literally" because hes not a christian, he just likes the christian philosophy!!!

You are totally on the right path. And Catholics or Christians aren't creationists. Only a couple religions consider themselves creationists.