25 Reasons Relationships Fail

You’re constantly keeping track of everything

If your partner’s home late from work or has one too many beers with the guys, and you find storing the info to use against them later, check yourself. Or, at least, you could take a leaf out of Gretchen Rubin’s book. The bestselling author’s personal “no calculation” rule is intended “to remind [her] not to keep score, not to stint on love and generosity [and] not to keep track of who’s done what.”