answer:I think willingness to put up with discomfort is paramount. If you are going about the two lovers in an honest way, discomfort is inevitable. Sometimes you will feel guilty, lonely, left out, or jealous. I have noticed that often, questions about jealousy revolve around a righteous indignation that no person who loves you should ever cause you discomfort, so that person should end friendships, come home at a specific time, etc. The logistics depend on the nature of the relationships. Maybe you have multiple casual partners that you see a few times a week each; maybe you have a primary partner you live with and other people you date on occasion; many permutations are possible.