Is Mathematics discovered or invented?

Mathematics is invented. It is a human concept created (not found) for the exclusive use of humans. It is a box which we have made for ourselves, to categorize, explain and understand. It allows for no controversie within it, and has strict rules, so in other words it is a truth, one of the largest metanarratives that exist. However, in my opinion, there is no such thing as truth, therefore math, an overriding "truth" is not found, but invented. Take Pi as an example: Pi is a perfect circle. There is no such thing as a perfect circle in nature, because it does not fulfill completely the concept of Pi. Therefore Pi is invented, created, to categorize something that does not exist. It is the way humans are: proud and arrogant of categorizing something that is not even real, because, in my opinion, nothing is real no matter how hard math tries to prove it otherwise. Many mathematicians, and non mathematicians as well, claim that nature is math. This is a ridiculouse claim, seeing as math is invented by humans as a form of explaining nature, not nature invented by humans to explain math. Math in invented by humans, is not a metanarrative, and we fool our arrogant selves thinking math can give answers, when there is not answer, or this is an infinity of them.