Some people are clickbait. Great headline, nothing inside.

Charm arrives far faster than substance, so the most compelling person in the first hour is not reliably the best one six months later. A strong opening can be assembled from confidence and good stories, while the things that actually hold a friendship together, like reliability and honesty in a dull moment, take time to become visible.

Give new people a few unglamorous tests before deciding. Do they turn up when it is inconvenient, do they remember what you told them, are they the same with a stranger as with you.