Good question! Different answers from different people. Some are. Some aren't.
Here we are as far back as I can remember best friends! Played together. Went to school together. Me on the left and Helen on the right. With both our last names beginning with W we even got to sit together because they seated you alphabetically back then! Then came colleges and marriages and kids and miles and then no contact. Me always waiting to loose weight to contact her and her? Don't know. So I guess we downsize friends in this busy world without even knowing it. So sad.