1. Sincere treatment: A true best friend will openly express their thoughts and feelings, while also respecting and listening to your viewpoints, and will not hide their true opinions just to cater to you. She will be the first person to provide sincere feedback and support when you need it.
2. Mutual support: Whether in happy moments of life or when facing setbacks and difficulties, a true best friend will be by your side, giving you strength and encouragement. She will do her best to help you solve problems, or at least provide a warm shoulder when you need to confide.
3. Long term companionship: A best friend relationship is not just a short-term friendship, it requires time to settle and test. A true best friend can transcend the distance of time, and even if they don't keep in touch frequently, their relationship remains deep. They are able to stay in touch and share each other's growth and changes in their busy lives.