what's the number one reason why couples break up?
Think we need official statistics for this, but one could mention the top ones.
Money, if the couple is not teens. Teen marriage have a "slim and none" chance of being successful. After the age of about 24, marriages break up due to lack of money.
I don't know the official number one reason, but I'd guess that a lack of communication would be in the top five.
not only one reason can be on top , but i can say lack of trust
Many reasons but the one thing I notice is jealousy and trust. These things are a killer. If they can't trust a eachother then they get jealous at one another and the relationship is bound to crumble.