Aloneness can also be with yourself. This is when you are purely 100 percent with yourself and your thoughts, no one else is around to take you away from you. It is when you can be your true self to yourself. Most people may not see this as being alone, but I do because in many ways this creates a certain kind of aloneness that can have particular results. This state of aloneness can result in both negative or positive ways. It all comes down to whether or not you like being with yourself.
The positive side of being alone with yourself is that you can truly look into who you are, learn and grow and work on yourself so you can become the best you that you can be. The negative side, which is why I believe this qualifies as being alone, is when you do not like yourself. A person with negative thoughts about themselves, being in this state, can result in the person moving their thoughts to become more depressive and against themselves. This is where depression and suicide can lurk and therefore being in the state of aloneness with yourself can result in psychological downfalls.
This can be used in writing. A character can have these negative thoughts about themselves, which may come out more when they are alone. Unlike being alone in a crowd, being alone with yourself is all about your mental status. So it can reflect the mental status of your character.
