if you have a sister you are...

I used to think happiness was something we built alone.
That if I just found the right routine, fixed myself, healed every wound, I’d finally feel light.
But somewhere between the chaotic family dinners and late-night heart-to-hearts with my sister, I realized:

Happiness isn’t just what you build.
It’s who you build it with.

A growing body of research is showing something beautiful:

People with sisters are more emotionally secure, resilient, and optimistic especially during difficult times.

One study from De Montfort University and the University of Ulster found that having a sister helps you develop stronger communication skills and emotional expression. People with sisters were more likely to talk about their feelings, feel supported, and have a higher sense of self-worth.

In families with sisters, researchers noticed less loneliness, fewer feelings of guilt or isolation, and more optimism about the future.
Why?