unfailing love

I Samuel 20:1-23
Jonathan made a covenant with the house of David saying "May the Load call David's enemies to account". "Jonathan surely let David know his father's inclination. May the Load deal with me, be it ever o severely if he do not let David know and let him away safely. Jonathan also saying " show the unfailing kindness like that of the Lord as long as I live, and do not ever cut off our kindness from my family- even when the Lord has cut off every one of David'w enemies from the face of the earth."
They make signal of arrows as a deal let David may safely leave.
This two friend were forced to apart.
Why?
Jonathan was really loved David as himself, didn't affected by the relation with Saul.
Jonathan seems knew one day David will be a king, and hope David have kindness to his family. Right now he promised he will let David safely leave when his father inclined to harm David.
They made a oath before the Load, they made covenant with their life.
The first day of new moon is a feast day.
How?
A real friend is devoted with their life to each other, the love of the Load let Jesus to be our saver is priceless love, unfailing love to us.