Yolanda vacillates between feeling extremely positive feelings for her friend to having extreme negative feelings for her, often for no apparent reason. when these changes in her disposition occur, she also experiences deep depression and sometimes engages in self-injurious behavior. on the basis of this information, yolanda most likely has personality disorder.

borderline

Explanation:      

Borderline personality disorder: In psychology, the term borderline personality disorder is also denoted as BPD, and is defined as an individual facing difficulties in regulating his or her emotions. The disorder signifies that an individual who experiences this disorder often intensely feels a particular emotion for a long period and he or she finds it difficult to get back to normal and stable baseline after encountering an emotional event that triggers him or her.

Symptoms:

1. Fear of abandonment.

2. Chronic feelings of emptiness.

3. Extreme emotional swings.

4. Impulsive behaviors.

5. Self-harm.

In the question above, Yolanda most likely has borderline personality disorder.  

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