living with boyfriend at 18

I'm a softmore dating a junior boy. my boyfriend is set on going to college in state, but I'm still undecided as to where I want to go to college(I'm only 15!). If I go in state and go to a college close to him, I might end up living with him. Even if I wasn't dating, I would've moved out into a dorm or some apartment. Is living with my boyfriend so young and fresh out of high school a bad idea? We have dated for a few years now and we love each other but I am always unsure about my future and if we will still be dating after high school(It is both of our first relationships). Advice?