I need help

I'm 19. I live at home still, and I goto college full time. I've never had a job because my parents prefer me to focus on my school work than on a job, so I depend on them financially for everything. My problem is, they dont like the person I'm in love with. They are threatening to send me to live with my grandparents in another state if they even catch me talking to him. They think he's worthless and that he's going nowhere with his life, and that he's not right for me. But they don't know him very well. He's offered to let me live with him, but that takes alot to just get up and walk away from my family like that, especially cause he is joining the air force and will leave for basic this summer, and then who knows what will happen the next four years. I dont know what to do.

Amber,
This must be a torturous situation for you, but just to point out what you already said, the person you love is joining to airforce in the summer. Please just realise that it's so hard being with someone whose first priority is the Forces. I know, I'm there.
Focus on your studies and abide by your parents rules for the moment. Try to stay in touch with this boy by all means; don't throw away love, but make it clear to him that you cannot choose to be with him when you don't know how long you will get to be together.
Once you finish college and he finishes basic, you can get yourself a job and start to support yourself, then see about being with him; if you truly love one another he will understand the need to wait until you are both able to really commit.

Thank you so much for the advice, and thank you for not being rude as some others would. I know some people will probably tell me i'm stupid and to forget him or things like that, so I really appreciate your response.