I think most people are like this KatB, but I think it's important to also realize that not everyone is like this. Some people actually thrive more when they are on their own, and prefer the life of a hermit. It is weird to the rest of the population, and people tend to think of these people as serial killers...but it isn't always the case. Certain personality types just don't do well in groups and prefer being around animals.
I think it is a healthy thing to learn how to be alone, at least some of the time. Most people stay in unhealthy relationships to avoid this very thing, because society has all kinds of judgements for people who are single or alone. Lots of important work can be done on your own though...like learning about yourself, what you want and don't want, what you like etc. Getting to know yourself better so you can be even better for the next relationship.
I think it is a healthy thing to learn how to be alone, at least some of the time. Most people stay in unhealthy relationships to avoid this very thing, because society has all kinds of judgements for people who are single or alone. Lots of important work can be done on your own though...like learning about yourself, what you want and don't want, what you like etc. Getting to know yourself better so you can be even better for the next relationship.