We are close relatives with the apes. None of the living apes will become human some day, and none of them is our ancestor. But we have a common ancestor which probably lived 7-8 million years ago. Than our branches separated. We became human and they became chimps, gorillas etc.
Anybody, including pre-school children, can see that we are looking like them (or contrary). As one can accept that the horse and the donkey, or the cat and the lion are relatives, our relation with the modern apes is the same.