People inevitably have to interact with others, and amid interaction, they face situations which are unwished and unpleasant. To minimize the stress hey obtain from those unwanted situations, they often choose to relax by hanging out in a group of people or having their own time. I personally prefer to relax myself due to the facts of silent atmosphere, freedom, and prevention of further consequence.
To begin with, when nobody is around you, you can relax well by letting your body relax. Since, there is no noise heard, your important parts of body can take a rest. For example, I had time of my own to relax after a big fight with one of my closest friends. I laid down on a bed, looking up the ceiling; the nervous and angry feelings I had gradually assuaged and I fell asleep. After I woke up I felt too well that I almost forgot I had a big fight with my friend.
Additionally, when you relax yourself, you need not worry about how people perceive your weird tastes. Really, there are people who do things that might seem a bit special to get rid of their stress; and being alone gives you freedom to do those! To illustrate, my brother used to make weird noise when he was mad at something. Surely, he would not have done it if his fellows were around.
Lastly, relaxing alone at least prevents you from reaching even worse emotional state. When you choose to hang out with your friends as a means of relaxing, you might feel even more stressed out because you are interacting with people again; it is unlikey but it is still possible. My friend, Vincent, who went to an amusement park with his friends can be an example of this. At the amusement park, Vincent wanted to ride roller-coaster whereas his friends insisted on not riding it because it seemed too scary for them. Eventually, conflict rose, and at night when Vincent came back to home, he sounded very frustrated on on-line chat.
In conclusion, it is true that there is benefit when spending time with other people as a means of relaxing. However, considering the facts that relaxing alone gives silent atmosphere, freedom, and prevention of a worse emtional state, I firmly believe that relaxing alone far outweighs spending time with people to relax.