I Can't get enough!

Me and my S.o. use to have sex at least 6 times a day. But now we work opposite shifts and only see each other once or two times a week. We don't live together and we both stay with other people. Now when we do have sex its only once and I'm not getting enough. He says he feel the same but he decides to masturbate when I'm not around. But I feel weird masturbating like I'm cheating or something lol sounds weird I know. What should I do?