Shame is an emotion which the psychological fear not the group accepted to be central. Shame is therefore a strong cultural phenomena.
Manifestations include avoiding social contact, for example by physically out of the way certain groups of people, avoiding a certain (talk) subject, or more figuratively by averting the gaze and avoiding eye contact.
Behavior which [...]

Gratitude is the act of recognizing a person by someone who has rendered a benefit, aid, etc a favor.
Gratitude is an emotion that involves an emotional sense of debt towards another person, often accompanied by a desire to thank you, or to reciprocate a favor done for you.
In a religious context, gratitude can also refer [...]

Love-shyness, a specific type of severe chronic shyness that impairs or prevents intimate relationships, is a degree of inhibition and reticence with the opposite sex that is sufficiently severe to preclude participation in courtship, marriage, and family roles. According to this definition, love-shy people find it difficult if not impossible to be assertive in informal [...]