Why making friends as an adult feels harder
Adult life removes many of the structures that used to create friendship automatically. School put the same people in the same place every day. Later, work schedules, moves, caregiving, relationships, remote jobs, and plain exhaustion can shrink the number of casual encounters in a week. You may be surrounded by people and still have very few chances to know any of them beyond a task or quick greeting.
There is also more self-consciousness. Adults often assume everyone else already has a complete social circle, worry that an invitation will sound needy, or expect immediate chemistry before investing time. In reality, many adults want more friendship and are waiting for someone to make the first small move. The goal is not to become instantly charming. It is to create enough repeated, low-pressure contact for familiarity and trust to grow.