What are the reasons for long-term relationships to fail?

[Anonymous]

I mean those that have been together for like 5+ years. Maybe a long-distance relationship or not. What can be the reasons for them to break up after that many years?

[Guy13]

Taking for granted, stagnant, and no vision. By that time should have been married.

[Asker]

Then why don't they just break up to find better ones?

[Guy13]

Why... for the same cycle to repeat itself. It is a people thing not a relationship thing. This is why relationships are often characterized as Work. If one does not remember to do the first year consistently then the above happens.

[exitseven]

Sometimes people change and they are just not compatible anymore or maybe they were not compatible to begin with and they were experiencing lust.