@Kayla905rose,
Why are you making this all about you? Poor little you. You are being punished. You need him. You can't eat or sleep (bullcrap.) You can't contact him. What do you do?
Look, this is real simple. He needs to take care of his business. And his business as far as his parents are concerned is keeping his grades up. When my wife and I first met, she was in high school and I was in college (both of us were juniors.) Her parents initially were hesitant about us seeing each other because I was so much older. My wife thought it unfair. (I fully understood their reasons.) Bottom line, it was on us to abide by what they wanted. We did. After a month or so, her parents agreed that if she got her grades up, they would meet me and allow us to see each other in their home. She did what she had to do and got her grades up. Her parents began letting me come over and 3 years later we got married.
The point is that his parents have control. He is under their roof. What you can do is urge him to get his grades up. See each other in school. Talk to each other in school. Maybe, if they see him working to improve his grades, he can ask about talking to you on the phone for 15 minutes or so each day.
Who knows, it might work out well for you. But stop whining and trying to make this about you. This is about him and his grades.