My friends didn't invite me to their catch-up. Will I grow out of feeling left out?

It feels both self-indulgent and immature to be annoyed at my friends for meeting up without me

Women who have at least three close friends tend to have higher levels of life satisfaction, according to a study of 422 women, ages 31 to 77 years. Pic: iStock.

Over the years, my friendships have formed into pods of three. I’ve come to realise there is a wrong end in threesomes.

The saying "three's a crowd" exists for a reason, says Kate Leaver, author of The Friendship Cure, Reconnecting in the Modern World. Kate describes her book as a manifesto for modern friendship, where she speaks to friends and experts on how to navigate the world of female friends from "breaking up" with someone who isn't good for you to maintaining our oldest friendship, and fostering newer connections for different periods of your life.