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The only permanent thing in life is change, and that is the truth. This is why we keep seeing people display different characters or lifestyles on different occasions, and at times we tend to get upset with them or even with ourselves for giving too much love or care. But we often forget that people can change at any time depending on different factors.
Sometimes we are the reason why people change, because they may discover a side of us they never expected, or they may not get what they wanted from us, so they quietly move away. At other times, people who were once friendly and loyal change because their level has improved and they feel they can no longer associate with us. The same thing happens in relationships, when a partner finds someone he or she believes they love more, they slowly drift away or begin to make flimsy excuses and show changes in character.
I had a friend who was very loyal, lovely, and calm when she was at her lower stage in life. We worked together and tried to help others in the little ways we could. I did my best to guide her in some areas where she needed help, especially in her academics. Everything went well until she left for service, then I noticed a great change in her behavior. She never had any reasonable excuse whenever I asked what the problem was. At some point, it became too obvious, and I quietly decided to respect myself and allow things to be.
From all these experiences, I have learned to calmly let go or withdraw whenever I notice a change, for the sake of my peace of mind. I have accepted that people do change, so I try to understand whenever such changes occur. As humans, we should always expect change at any point in time and find different ways to handle it when it comes.