Actually, I think you may have this backwards.

The burden of proof is on the theist - the one making the claim for the existence of a god or gods.

I can claim that my neighbour's dog is the creator of the universe. It is not up to you to disprove that, it's up to me to prove it.

There is no - and I do mean no - rational, empirical, testable evidence for the existence of a divine super-entity, especially one that's interested in you as an individual.

And there are mountains of evidence that directly contradicts the existence of said super-entity.

That's not to say that evidence might not arise tomorrow, but as it is now, and in thousands of years of trying, the evidence just isn't there.

All that said, by all means, if your faith provides you comfort and a sense of community, then have at it. Just keep it out of the schools, courtrooms and legislative assemblies and don't ask for a tax break.