Wow this is very good to see and I must say it was a very interesting well educative one.
First of all let me say trust no one and always tend to adapt when people change ,cause that is one major fact about human.
On the other way round we need to have a forgiving spirit Irrespective of whatever people might have done to us,it is very normal for us to react due to the level of how hurt or disappointed will are,but if all having a forgiving heart goes a long way,it brings peace and clears away burden from our heart