Humans will always be humans, and there is nothing anyone can do about that. The fact that we are ever-changing says it all. We are not static; for that reason, we are capable of doing so many things and can easily change our minds, especially when situations are no longer favourable.
Humans as emotional beings
The fact that we are emotional beings is a major factor in how we deal with people around us and how we respond to situations. That is why a relationship that is cordial today may become something else tomorrow, and separation may become inevitable. Today, you may be on good terms with someone or a group of people, but later, you begin to notice a gradual shift.
The truth is, we all come into this world alone, and we will most likely leave it the same way. So, nobody will pause life entirely because of our absence. If something happens, we can easily be replaced. The people most likely to miss you when you are gone are those who truly know your value, those whose lives you have influenced in a meaningful way. It is just what it is, and life will certainly go on without you.
Being good doesn’t guarantee being treated well
Just because you are good does not mean good will always come to you, and just because you are bad does not mean bad things will happen to you all the time. The world is made up of both good and evil; therefore, what we get out of life can sometimes feel unpredictable.

As far as I know, there is no manual for living life. Just because someone takes a particular path and succeeds does not mean you will achieve the same result by following that path. It is also important to understand that being good to someone does not guarantee that they will be good to you in return.
Once you accept this, you will stop taking things personally when people fail to reciprocate your kindness. When you choose to do good from a place of sincerity, you won’t be troubled by the outcome, even if your efforts are not appreciated.
This is something I have experienced personally. I have supported friends, financially and physically, but did not see them show up for me in the same way. However, a different set of people came through for me when I needed it. That is simply how life works.
In all we do, we should strive to live meaningful and purposeful lives. You never truly know what someone is going through at any given time. Unless you walk in their shoes, you may never fully understand their reality.