Friendships shift over decades. Friends who were essential in your 20s might be strangers now, and friends you barely knew at 35 might be your closest at 45. Audit, not loyalty, decides which friendships keep getting your time.
The reciprocity test
Over the last 12 months, who initiated? If you've reached out 8 times and they've reached out 0, the friendship is one-directional — and one-directional friendships drain. Stop the reach-out and see what happens. If they don't reach out for 6 months, the friendship has effectively ended already; you were just keeping it on life support.
The energy test
How do you feel for the rest of the day after seeing them? Drained, slightly worse than before? That's signal. Some friends are wonderful and exhausting (active children of your friends, friends in crisis), and the cost-benefit changes with your own capacity. Others were always exhausting; you just normalised it.
The 'who do I tell good news first' test
List the last 5 pieces of good news in your life. Who did you call first? That's your real closest circle. If a friend isn't in that list and hasn't been for a year, the closeness probably isn't there from your side either, regardless of history.
How to let a friendship fade gracefully
Most friendships don't need formal endings. Just stop initiating, reply more slowly, decline some invitations. Mature friendships understand the rhythm of life — kids, work, illness, ageing parents all naturally reduce contact. The friend you don't see for a year but who's there when needed is sometimes more durable than the high-maintenance one.
For toxic friendships (criticism, contempt, betrayal patterns), faster fade may be needed. You don't owe an explanation; consistent unavailability is enough. Most people get the message within a few months.
Pruning friendships isn't betrayal — it's how mature relationships work. The friends still in your inner circle at 50 will be the ones you chose to actively keep, not the ones you accumulated by default.