There’s a dark side to gratitude.

A woman has been called “ungrateful” for ditching her birthday party after her friend ignored her wishes and threw a ...

A woman's friend called her 'ungrateful' after she walked out of her own birthday party because it was not 'small' as the ...

Ungrateful people don't embody true loyalty in their relationships; instead, they urge their partners to "work for" their ...