Kinds of relationships
Family. The people you live with or are related to.
Friends. People you choose to spend time with and trust.
Coworkers. People you work with. Friendly, but mostly about the job.
Acquaintances. People you know a little, like a neighbor or a clerk.
Partners. Someone you date or are in a romantic relationship with.
Different closeness, different sharing
You share more with close people, like family and good friends. You share less with people you barely know.
For example, you might tell a best friend about a hard day, but just say 'I'm fine' to a clerk at a store. Both are okay.