I mostly talk with my brothers about how we feel about some relatives and this helps us in some way to express what we feel

That's exactly what I mean. We all need people in our lives who we can share our thoughts and feelings with and with whom we can experience new things and talk about stuff that we usually don't talk about with other people. The need for deep emotional connection is what every one of us have, but not all of us are lucky enough to foster and experience such relationships.

Even the greatest of experiences, if enjoyed alone, still don't feel as good as enjoying them with someone you care about. There's something about seeing them happy that gives you this strange relief and comfort and joy which makes you enjoy the moment in a much greater depth. The validation that this moment is worth it for them, makes it worth it for us.

Thanks for the brilliant comment :)