Parental consent

Jayce
Okay, so I'm 21 and so is my boyfriend, we have been dating for 8 months now. We have had sex a total of 3 times. Mainly because he lives with his parents still and I live with my step mom. We are both in school (how we met) the problem is his parents won't let him spend the night with me but allow me to spend the night with him as long as I sleep on the couch. We can't get a weekend away because our weekends don't line up. Hence why I want him to spend the night or stay at his place. I have tried persuading him that they won't hear us but he is scared that they will. My family accepts that we are active but his family won't even consider it. On a normal basis I would understand if we were underage but we aren't. Hell we are old enough to drink. His dad treats him like a kid and tries to do the same to me but I put my foot down. It's really starting to piss me off, any suggestions on how I can get his parents to back off or at least be lenient?