My partner prefers the company of his friends over being with me

In a world where companionship reigns supreme, I've found myself struggling with a peculiar issue. My partner, a man of diverse tastes, has a peculiar preference for the company of his friends over mine. This is not your average case of neglect; it's a full-blown phenomenon that has left me questioning our relationship. His friends, a mix of European, Canadian, Mexican, and Colombian men, seem to captivate him in ways I can only imagine. They share a bond that I'm yet to understand, a connection that makes him light up in their presence. Even his friends' girlfriends, a diverse group of women from the United States, Italy, France, and Colombia, have become an integral part of our social circle. Watching him interact with them, laughing and joking as if I'm invisible, has left me feeling like a third wheel. It's a strange, uninvited reality that has me wondering if I'm truly a part of this partnership.