I need advice.

I would not consider myself a Christian, but i do believe in God, respect him, and love him. My family is Atheist, and thinks that its “stupid” to believe in God, so i have not told them yet. I always wonder if God might be dissatisfied or disappointed because of that. I do not want to be disrespectful or show him that I don’t care enough to tell people the truth about my belief in him, but I’m worried that my family will stop treating me the same and/or see me as a stupid person with a non-logical way of thinking, or something like that. What should I do?