I am not sure apathy would be the word to describe it because all the connotations I found online are negative.

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I am just looking to see if there are more individuals that feel this way because my sister keeps telling me how odd I am. I don't really care for anyone other than myself, unless they provide some type of benefit. For example, I care for the people I date/ are in a relationship with because they provide sex and companionship. However, when they stop providing some type of benefit, I stop caring/talking to them. Apart of that, I rarely talk to people that I perceive won't bring some type of benefit.

I do feel very good about my life because I can do whatever I want, whenever I want. I am not trying to change the way I am.