Of course we don't create them, so what does? Nature? They've just always been? If we recognize them they obviously exist...why do they exist?
You are asking questions whose answers you won't accept. Existance exists. It's axiomatic. You can posit a "Someone must have PUT them there!" answer but all that does is insert one more step before you arrive again at these questions. After all, once you decide there must be a big ghost in the sky, the natural questions return: "What created God? Why does he exist?" Then you get people just making up answers off the tops of their heads, assigning this fictional question-stopper a human personality and spinning out some tale.