Counterintuitively, perhaps, I find the less I believe, the stronger my faith.
So, for example, the fact that I do not have to defend creationism against the scientific consensus in respect of evolution does not diminish my faith, just leaves it untarnished by the dubious tactics of the intelligent design contingent.
All one really needs to believe is that God exists, and is perfect, and that we all should try to our utmost to get as close to that perfection as possible. Jesus told us to do that by loving God, and loving each other. And all the rest is detail.
Best wishes, Strivax.