Surely everyone of us should have already experienced that we have been disappointed by someone close to us, who we have helped altruistically, in the worst possible way.
Usually this leads to a dispute and the injuries that have already been suffered become more serious.
Then, in my humble opinion, one should act according to the phrase "Better an end with horror than terror without end". It's better to act according to the phrase "Dearer, an end with horror than terror without end".
It may sound hard, but then you should also think about your emotional well-being and the most important thing is that you can also look in the mirror afterwards without any problems.