Career Managing Up → Best-Friend-Forever: Nature

Feedback is notoriously difficult to give and to receive

When ppl suspect you and boss are BFF, he may treat you differently

Career stagnation and bad blood: he may resist you leaving. You may be hesitant to leave. May not provide opportunities for you to grow

Due to BFF nature, you may tend to overshare things which may come back to bite you during performance appraisals.