My best friend and I met in New York, and then we moved to Denver.Once we moved, our friendship changed, and he suddenly ghosted me.I tried to understand what I did wrong, but I'll never truly know.I recently endured my first friendship breakup one that caught me off guard and ended without explanation.Seven years ago, I was living in New York when a mutual friend introduced me to a guy with similar interests and personality traits. We even identified with the same sports teams. We made each other cackle by reciting foreign accents or comedy bits while also melting into couches while spinning Pink Floyd vinyl.As we spent more time together, we grew side-by-side, investing in each other's personal growth.During the pandemic, I moved to Denver, and after two years of staying in touch, he followed me because he wanted easier access to nature. But not insignificantly, he moved knowing I'd be there for him.That move would ultimately cause the end of the friendship, leaving me hurt and confused.We no longer fit together in DenverThe early reconnection was joyful chaos. We'd golf on gorgeous mountain courses, hit the bars to watch soccer, and, most importantly, continue laughing.As he settled in, I tried expanding his social circle by introducing him to my friends. Unfortunately, this wasn't as seamless as I hoped.I then spent more time traveling than staying put in Denver last summer. When I returned in the fall, I reached out to hang out, but uncharacteristically, he didn't respond.After a few more texts, I still hadn't heard from him. By the fifth unanswered text, I was no longer in denial. One of my favorite people was ghosting me.I tried calling him. After no response, I texted to express if I had done something wrong, I wanted to apologize.My desire to right the ship ended up in capsizingMy friend took two weeks to respond a gestation period to draft three paragraphs.In his mini-essay, he shared that he didn't want to be friends anymore and asked me not to contact him. The friendship was over.I'd like to believe my lack of response was due to acceptance, but it was likely because I was speechless.A few months prior, he and I were flexing the bounds of our connection, from quoting the crudest moments of "South Park" crudest moments to having an articulate, heart-to-heart chat. Now, he wouldn't even acknowledge my presence.I tried to figure out what exactly went wrongAs this was my first overt friendship breakup, I tried to figure out where I went wrong.My initial reaction was to recreate scenarios between us and analyze everything. Was it something I said? Could I have done something differently? Could I have hung out with him more?Those questions were all dead ends. After enduring weeks of rumination, I uncovered a harsh reality.When a friendship ends, you're not entitled to know anythingAt work, a sudden termination is often followed by answers explaining exactly what you did wrong in the role. A divorce needs reasons to influence legal and financial implications. But with this friendship breakup, there was no need for explanations.My nebulous misdeeds were no longer the point. I just had to accept that whether he was my friend for a reason or a season, he wouldn't be for a lifetime.Fortunately, I found the silver lining.Losing one best friend made me wake up and double down on appreciating my current close friends. That doesn't just require being present for the good times; it's about being there through it all. It also means communicating any discontent so that I won't be blindsided again.