There is no absolute proof in science. This is because science always is self critic an searching for the best answer.
In this field, the theory of evolution is one of the best, having the most evidence.
Creationism just puts a metaphysic imaginary friend called "God", as soon as they don't understand. Because it is thought up as a metaphysic omnipotent thing, it is untouchable by science.
Talking about likeliness: A omnipotent metaphysic "God" is more likely? Are you kidding me? It's by far more likely that the tooth fairy exists...
I am an evolutionary Biologist, so I can assure you: The Human species evolved from a common ancestor of nowaday apes.
(As "Ape" is no species, but a group name of Chimpanzee,Gorilla and so on, you could say, we evolved from apes, having in mind, that the common ancestor belongs to the group "apes" too.)