Throughout life we form relationships with various people. Over time our relationships either grow, stay the same or end. Sometimes they can become non-existent without any valid explanation as to why. So how do you come to understand and accept when a relationship of any form comes to an end without anything dramatic to have warranted the end of it? They could be going through something which makes them disconnect.
Hurting people often hurt other people as a result of their own pain. If somebody is rude and inconsiderate, be certain that they have some unresolved issues inside. It could be that they have feelings of jealousy, anger, resentment, disappointment or some heartache which they are trying to cope with or overcome. And as a result they are no longer the friend to you that you are to them.
Focus on all the good and wonderful enriching relationships you do have. Express gratitude for the good that you do have. Cut out toxic relationships from your life. Doing so does not mean that you despise or hate the people you cut out from your life. You are choosing you ; you choose to treat yourself with loving kindness.
You are not responsible for the choices and actions of other people and neither do you need to fix them or expect them to be what you think they should be. The only things that you have control over are your thoughts, feelings and actions. By closing the doors to the things that do not matter or that do not add value to your life, you create space for more good in your life.