A person who doesn't share can be called selfish, stingy, greedy, possessive, tight-fisted, miserly, or parsimonious, often depending on why they don't share, with terms like private, secretive, reticent, or aloof used for those who hold back personal information or emotions due to trust issues or past experiences, rather than just material goods.
There are a variety of expressions to describe someone who does not wish to disclose other types of information, such as "secretive," "tight-lipped," and "discreet." However, "private" seems the best for the situation you've described. Two other possible candidates are unforthcoming and guarded.
exclusive, sole. not divided or shared with others. individual, single.
Some common synonyms of secretive are reserved, reticent, silent, and taciturn. While all these words mean "showing restraint in speaking," secretive, too, implies reticence but usually carries a suggestion of deviousness and lack of frankness or of an often ostentatious will to conceal.
Some common synonyms of stingy are close, miserly, niggardly, parsimonious, and penurious. While all these words mean "being unwilling or showing unwillingness to share with others," stingy implies a marked lack of generosity.
Words like "miserly" and "possessive" describe this trait in a person.
captious carping fussy hairsplitting hard to please hypercritical nagging niggling overcritical pettifogging quibbling. ADJECTIVE. finicky. Synonyms. choosy fastidious fussy scrupulous squeamish.
One factor is whether or not the person is an introvert. Introverts process internally, then are ready to share. An introvert is also more likely to be private or shy, so their temperament might lend itself to not sharing about their internal world as readily.
synonyms: incommunicative. inarticulate, unarticulate. without or deprived of the use of speech or words. blank, vacuous.
If you don't like sharing information or letting other people know how you feel, you're secretive. Secretive people probably make the best spies. When a person is secretive, they seem mysterious because they don't reveal much about themselves.
Some common synonyms of unbiased are dispassionate, equitable, fair, impartial, just, and objective.
reluctant / reticent
Reluctant means resisting or unwilling, while reticent means quiet, restrained, or unwilling to communicate.
out of whack
To improve the chance of sharing, we can try to find a better environment (e.g. a quiet space), a better time of day (e.g. some people are more likely to share at the end of the day), include a certain friend or maybe even some type of witness like a therapist, or try doing a mindless activity together and see if that ...
But it does provide some rough guidelines as to how soon may be too soon to make long-term commitments and how long may be too long to stick with a relationship. Each of the three numbers—three, six, and nine—stands for the month that a different common stage of a relationship tends to end.
Some common synonyms of detached are aloof, disinterested, incurious, indifferent, and unconcerned. While all these words mean "not showing or feeling interest," detached implies an objective attitude achieved through absence of prejudice or selfishness.
Poor communicators might leave you guessing about how they think or feel about a situation rather than sharing insight. They might not actively take part in meetings, email conversations or phone calls. They might also get distracted, overwhelmed or disengaged.
Tell your boss it's about you
It's their job to manage, support, direct, and develop you. So, rather than going with a direct attack of, “You're not communicating clearly with me” or “You're bad at providing written briefs,” re-position it to be about helping you.
unconnected
The biggest red flags in a guy include controlling behavior, excessive jealousy, manipulation (like gaslighting), lack of empathy, and anger management issues, often seen through verbal abuse, aggression, or emotional outbursts, all indicating deeper emotional instability and poor communication. Other significant signs are disrespect, constant criticism, dishonesty, refusing emotional intimacy, blame-shifting, and a pattern of love bombing followed by devaluation, suggesting an unhealthy dynamic.
Fear / Anxiety – Someone may be afraid of what others may think. They fear being judged or rejected. Building safety in the group prior to attempting to draw this person out is important. Do that by thanking people for sharing something and let them know that it is OK.
Signs of Emotional Detachment
Some nitpickers are just highly arrogant types who think they know what's best for everyone. Others are actually anxious and worrisome, and they nitpick because they need to feel some sense of control. Others believe that they are offering the team a valuable contribution by over-analyzing everything.
The psychology of nitpicking boils down to the projection of perfection and insecurity. When we expect ourselves to be perfect, look perfect, and act perfect (and judge ourselves harshly otherwise), we unintentionally project those same expectations and judgements onto our partners.
Nitpicking in relationships is characterized by excessive criticism of the other person, often in an overly fussy, pedantic, and perfectionistic way.