If you put a couple in a room together, those two people, as the only creators in that room, have the power to create a literal heaven between those four walls. So why do so many people create a hell? Let's simplify and remove one of the people. Even one person, alone in a room will often create a living hell for themselves. They will fill the space with their doubts, fears, addictions, blame, worries and desperation. Have you ever been that person? Being alone will show you who you really are, and if you cannot get-on positively as the sole master of your space in that room alone, then you can absolutely forget about it after you add another person. You had better start practicing being happy when you are alone.