College trouble.. advice??

I am going into my senior year of high school and I’m needing help discussing living situations for college. My boyfriend of two years wants me to move in with him after high school and although I’m excited for this next step in our relationship, I still am worried about money and bills. I’ve thought about living in a dorm, but I’ve heard it can be expensive. My parents say I can live with them, but my dream college is two hours away so I would have to go to a different college. I don’t know what to do and am super conflicted of my options.

Side note: if I do decide to live with my boyfriend, how am I supposed to tell my parents?