I have to agree that if the other person is looking else where than I don't feel it's worth the effort or time to fight for the relationship or person since they clearly aren't interested in the one they've got. This is an interesting topic though because I think the real question is don't we all want to be fought for? And I don't mean in the sense that we're looking to play games or find other people when we've got something good right in front of us, but if we were to tell the other person that we were insecure about the relationship wouldn't we want that person to stand up and say, HEY, I'm in this and want to work it out long term.