I thought if you had been together that long you had already weathered all the storms and you would be able to go the distance. Same thing with other relationships. Friends/relatives/whatever. But there is no time frame for it. People can change whenever wherever however on a dime. After a very short or very long time. Options are always open and behavior/attitude/views are always up for grabs, flexible, fluid. The older you get the more you realize you know very little. I guess by the time I die I'll realize I never knew anything. :(