Have you experianced this how did it happen and if you did it to someone else how did you do it? I was phased out in the past by a woman I was at uni with and who I and my parents helped flee an abusive partner a couple of years after graduation, doing a middle of the night move and helping her get a new place to stay and so on. A year later when I had some issues with depression due to breavement she dropped me because I was being a drag! She was quite blunt about it but other times I've been phased out slowly so that I barely even notice until its been too late and to be fair I've done it myself to people. One friend who was more a frenemy I pretened I never got a letter when she was about to leave the country so we "accidentally" lost touch when in reality I ripped her letter up and put in the bin.
I also ditched a couple i was friendly with because the wife was so nosy and had no concept of boundries, they were always inviting themselves over to stay and then you'd find her riffling through your things and paperwork, she was brazen. I moved and never told them where I was moving to.
Aside from that i am lovely 