BFF or wham bam thank you man?

As one whose life has seen a lot of closures recently, I have been pondering a lot of issues, including the nature of friendships. I found the following article which helped point my thoughts in a positive direction - toward that steady ground I seek.
This article by Valerie Reiss of Holistic Living includes a phrase so illuminating to me; "There's something about betrayal or abandonment in friendship that often feels harsher than that of a lover." That tells me I am not alone and also teaches me that all friends, no matter how fleeting, have influence and impact upon my life. It is then up to me to choose whether any insight gained be positive or negative.