It is not only the loss of a partner, or someone in our family, that can cause us to feel distressed and grief-stricken. Losing a close friendship can cause overwhelming feelings of sadness of bereavement.
Friends form part of the jigsaw which makes up the secure base of our lives. We feel safer and more confident when we create links and have a circle (no matter how tiny or how large) of people with whom we have understanding and on whom we can rely.
The reality of a friend moving away, or travelling, or even emigrating, will be hard to bear but can be rationalised. It will be painful, we will be sad, but the idea can be borne.
However, when the friend is focussed on another person, when they seem so preoccupied with another and there seems no room for us, uncomfortable anxiety can grow.
All-encompassing emotional life events like the birth of a child, or falling in love, can give the impression that there is no longer room for the friendship. It is very hard to cope with being suddenly demoted, side-lined and not the priority. We have thoughts of betrayal.
Although the rational, thinking, part of us explains that the friend is in a whirlwind of enrapture, we feel the cold wind of panic. The situation recalls, and resonates with, any abandonment or rejection we have suffered in our past.
If we have previously experienced traumatic relationship losses or break-ups, the re-opening of a painful wound is keenly felt.
Psychologically there has been a break in one of the attachment bonds which we wrap around ourselves. We feel displaced and insecure as the emotional ground we stand on has shifted. Our world seems changed and the kaleidoscope has been reconfigured.
We need time to assimilate the different patterns. Our other primary relationships become even more important by offering stability and reassurance. We can be soothed when these other important attachment figures remind us that we are loved.
It may help to remember that our friend has been overtaken by a tsunami of emotion. It was not their intention to weaken the links between you both. Sadly they are no longer on the same track that you thought would continue forever, but their motive was not to hurt or be unkind. They might not even comprehend the impact on you.