In 1st Samuel 20:17 Jonathan made David reaffirm his vow of friendship again because Jonathan loved David as a brother. We experience true deep friendship with one another when we do life with them, go through the highs and lows with them, and learn how to express our true feelings with them. The end goal is to be conformed into the image of Christ and one of the ways we get there, is when we sharpen one another in godliness. Also: let’s not wait till someone passes away to eulogize them at their funeral; let’s tell them now how much you love and appreciate them and how much they mean to you. It will be a tremendous blessing for the person hearing the news.