Sleepovers with boyfriend

So I've been with my bf for just over a year now, we are sexually active, only do it at his house. My parents are strict, we want to stay the night and sleep together at his house, we have slept together a few times we went to the city and camping with friends but my parents think we stayed in different beds. We both love each other very much and always use condoms, we're going on the weekend to the doctor to get the pill for me. My parents won't allow us to stay together. Even though we've been alone together at both houses, been camping, he has stayed at my house but in the lounge room only a few times when we drink. But we think it's silly that we can't stay at his.