Should he talk to his parents?

When he comes over to my apartment, he stays for a while. We have sex, then fall asleep.

After this, he always leaves between midnight and like 1am and heads back to his

house. He says he does this because he does not want his parents to get upset

with him. They also do NOT approve of premarital sex but we do that anyway.

What they don't know wont hurt them I guess? He says that he wants to stay the

night with me but he won't talk to them about it. He has never asked them if he could

stay over before. We are talking about getting married soon and he wants to propose next

summer. We both agreed that we would like to live together before getting married,