How can we believe in G-d if we don't see Him?

Questions for today: How can we believe in g-d if we don't see him and how is it that we can just believe that he created us and everything in the world? I mean we don't see huge miracles that can give "proof" (obviously He's allowing us to wake up in the morning, breathe, etc...) A lot of teachers will say we're the only people that have the same Torah and "stories" passed down through the generations and it didn't change from Moshe at Har Sinai so that's supposed to be proof to how we're such a great nation and we're the only ones like that and that's why should believe that there is obviously a g-d. But how is that supposed to be proof? It also feels like a question you "shouldn't have" because you're supposed to just have belief in Him...