Yeah, I'm 100% sure it's a male, but just give it some more time and you will see how the flower parts develop. I know the first inclination is to just pull it....but you CAN learn from male plants, too. Plus, hey, if you really want to learn some cool stuff, then let the male grow to maturity and then collect the pollen when the time comes...etc. It could open up a whole other world to you! Who knows? Anyway, these kinds of things happen to everyone who grows. Don't be discouraged! Good luck in the future!