Hello Marvyn! I'm glad to see someone asking big questions like this! The truth is, everyone's experiences give them different perspectives on life.
My best guess is that your family is religious! (So is mine). However, someone raised to not believe in God probably won't because their beliefs were shaped by something else. I was taught that God was in everything, but as I got older, I became agnostic (meaning I'm not sure if God is real or not, and I don't think we can ever prove that he DOES exist or that he DOESN'T exist). This is because I saw a lot of sad things and wondered how God could do that. Other people think that science is enough for them. And other people still (like you, I think!) believe God IS a basic of life, that he is everywhere.