Why? My girlfriends parents forbid her to see me FOREVER! why?

Me and my girlfriend have been going out for 5 months now. Me and her have been through so much and now I cant speak, see, or even get close to her house or school. We both love each other more than anything in this world. Her parents HATE me. Her dad wants to kill me she said and her mom through everything I gave her away. What happened was me and her were going out without her parents knowing. We told them we were just friends. But we lied and they found out. They also found out we were having sex INSIDE her fathers house in her room. We were both virgins and we love each other.But her parents are really religious. She is 16 and I am 17. But everybody makes mistakes I found out I made mine. She says her parents don’t want to HEAR from me at all and her dad does not want to see me or he will kill me literally. Her dad told her to get out of the house but she refused. But I have to talk to them! but I don’t know what to do! I love this girl with all my heart and we already had everything planned but just because of the mistake we made to have sex at this age now they see her as a dirty Plate They filled her head with lies telling her that I cheated on her that I dont love her that she could of done better but they dont know me at all! her parents bearly know me and they DETEST me. I have her mothers phone number but she said not to call. They will just hang up. I don’t know WHAT TO DO! She doesn’t believe her parents but I feel like if this keeps going that im going to lose her forever because of her parents. help!

• Thank you =(