Is it OK to date someone 7 years older than me?

No. There is this rule of thumb that says: half the age of the older partner plus seven is the socially acceptable minimum age. You are both of age. So, no problem.

Is 7 years an age gap?

Half-your-age-plus-seven rule An often-asserted rule of thumb to determine whether an age difference is socially acceptable holds that a person should never date someone whose age is less than half their own plus seven years.

Is it OK to marry a man 7 years older?

If you marry a man 7-9 years younger, your mortality risk goes up 20 percent! If a guy marries a woman 7-9 years younger, his mortality risk goes down 11 percent! Studies show that women mostly prefer men their age, but most marry older. Only men—and not women—benefit psychologically and socially from a younger spouse.