The question should not be about believing or not believing in science. Science is merely the study of our world and universe. It is the best guess human beings make about how our world works. Every claims we make about the universe must be tested. Is there god or not is an important question. 
    Also, another important thing  we have looked for god a lot and have found no evidence of it's existence. furthermore, it the responsibility of the person making the positive claim to prove the claim. (burden of proof lies on the person making the positive claim.) So, people whole think god exists needs to show us, skeptics where is this thing called god. 

 I may claim unicorns exists. Can you prove me wrong ? I also may claim there is flying spaghetti monster ? Is it your responsibility to prove I am wrong or is it my responsibility to show these creatures do actually exist. (BTW these are classical examples)

(Personally, if you think you life is better by having a imaginary friend then go ahead. ) Just don't make false claim and talk illogical.