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10 Super Common Reasons Couples in Long Term Relationships Break Up

Cosmopolitan Logo By Laura Beck of Cosmopolitan | Slide 1 of 11: Mature couple having relationship difficulties

We've all been in relationships that we were positive would stand the test of time and then crumbled beneath us. Sometimes we know the exact reason why — I'm looking at you, Mrs. Name Redacted! You should've kept your nose out of my relationship with your son, Name Redacted! Using this Reddit thread about why people who've been together for 20 years or more decide to call it quits, and a few other well-researched sources, I've compiled a list of reasons why some long-term relationships fizzle instead of sizzle (tm, me).

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