How to tell my parents...?

I’m a 20 y/o college student, going full time and working part time. I met someone in my college class this past October, and we have been together since, almost 3 months. He and I want to get married. I know it seems rushed but I am head over heels for this man and he is the same for me. We talked about it and the wedding would be August 18, 2018 since that was roughly around the time school started, he said on the first day he couldn’t take his eyes off me. My parents are super controlling of me, currently pay for everything of mine. How can I go about telling them I want to marry this man? They won’t approve and will take my phone, car, and possibly kick me out. He makes enough to support us as long as I continue to get my education and every so often buy groceries or put a little towards rent, but my parents will either refuse to let it happen and not let me see him anymore or they will cut me off and disown me. By the way, no I’m not pregnant for anyone who may ask that. So any advice?