How Do I Tell My Parents About Him? (Advice)

So me and my boyfriend have been dating for 8 months now, I'm 19 and he's 20 but we are in a long distance relationship so we text, call, facetime, etc. Everyday. We have known eachother for almost 4 years (talking online) and we were best friends before anything. And it just progressed into loving each other. Fast forward to now, we have been dating for 8 months. We are madly in love and have talked about our future, marriage, and everything. I'm supposed to see him FINALLY in august when my parents are away. But the thing is, they don't even know he exists. My family is not an open minded family. They are extremely religious, extremely judgmental, defensive, and argue easily and are sometimes violent. I'm scared of their reaction, terrified actually. I just need some advice on what to do.