Why do couples break up after so long?

Insecurity, jealousy and lack of trust: Couples break up because one partner feels unworthy of being loved. Eventually, lack of trust and other negative feelings may deteriorate the relation. Couples break up because of insecurity and jealousy.

What are three main causes of couples breaking up?

Couples break up for many reasons. Relationship pundits often attribute breakups to money, sex, in-laws, children, and other normal life stresses .Other Reasons Couples Break UpHistory of alcohol abuse or abuses other drugs.Childhood history of trauma.Mental health disorder or diagnosis.