You have to keep in mind, what might be a sign of affection or caring for one person, might have no meaning to another.
Some people express their value of another person in compliments, others do in touching, or bringing over food when invited over. But some might not receive the act of bringing food or gifts as a sign they are important.
So when it comes to showing other people that they are important to you, do what feels natural. When it comes to figuring out if other people value you, focus on what words or actions they did that seem positive. The negative signs, or signs against you, may speak louder because human beings are wired and primed to detect threats more than nice things.
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