Watson and Holmes are good friends.

Watson returned to England from an injury in Afghanistan and met Holmes when he was looking for someone to share a house with. They did not know each other at the time, but from then on, Watson became Holmes's assistant.

Watson has helped Holmes many times and is also Holmes's friend. Watson admired Holmes, and Holmes trusted Watson.

Extended information:

Holmes admired Watson for his enthusiasm, intelligence, down-to-earthness, generosity, and mischievous humor from time to time. He also had the advantage of being silent and silent. Holmes admired this. Praised more than once.

Watson has sideburns and an approachable appearance. In the case of "The Lone Cyclist", Holmes asked Watson to investigate the situation on the ground. When Watson came back to report, Holmes scolded him for not using his personality and appearance, which is friendly and good at communicating with women, to investigate the situation.

Reference: John H. Watson-Baidu Encyclopedia