Because people are emotional ~ after writing some psychological feelings, they can let friends share their feelings and thoughts ~ Another possibility is that they really want people who are very, very important to them to see them, and at the same time they can understand their pain and happiness at that time ~ ~ They need comfort when they are lonely, so they write them out, hoping to share their happiness with others when they are happy, so they write them out ~ In short, they want others to share them.