'Friend' in the Bible

I grieve for you, Jonathan, my brother.You were such a friend to me.Your love for me was more wonderfulthan the love of women.

And David said, Is there still anyone of Saul's family living, so that I may be a friend to him, because of Jonathan?

And the king said, Is there anyone of Saul's family still living, to whom I may be a friend in God's name? And Ziba said, There is a son of Jonathan, whose feet are damaged.

And David said, I will be a friend to Hanun, the son of Nahash, as his father was a friend to me. So David sent his servants, to give him words of comfort on account of his father. And David's servants came into the land of the children of Ammon.

But Amnon had a friend, whose name was Jonadab, the son of Shimeah David's brother: and Jonadab was a very subtil man.

So Hushai David's friend came into the city, and Absalom came into Jerusalem.

And it came to pass, when Hushai the Archite, David's friend, was come unto Absalom, that Hushai said unto Absalom, God save the king, God save the king.

And Absalom said to Hushai, Is this thy kindness to thy friend? why wentest thou not with thy friend?