Should I Tell My Crush I Like Him?

[Question]

Ok, so I have this crush and I've liked him for seven months. (I'm a girl, I know it says in my profile I'm a guy, but I'm not). The only problem is, he's a sophomore and I'm a freshman. (In high school). He's single, and we talk a little, but we only share one class together. I laugh at his jokes and try to flirt, but I don't think he's getting the message. Oh, and did I mention, I don't even have his number! I also don't have social media like Twitter or Facebook. So, what do you think? Should I come right out and tell him or wait until next year when I'm a sophomore and he's a junior?