Growing older changes friendship from frequency toward quality.

Early friendships run on availability, and you assume the ones you see most are the closest. Later you see people rarely and still know exactly who would come if you called. Depth stops requiring frequency, which is fortunate given how life scatters everyone.

Stop grading friendships by how often you meet. Ask instead who you would tell first if something happened. Then make sure those few people hear from you occasionally, since quality still needs some minimum of contact to stay alive.