Suppose you suspect that a manager or colleague is holding a grudge against you for no explicable reason. Perhaps this person seems to, for example, behave coldly or chronically irritated with you, avoid you and/or does not assign you desirable projects. How can you improve the relationship? First, re-evaluate: Consider whether your manager/colleague is really snubbing you, or is indiscriminately cranky, aloof or social inept with everyone, is shy, or is coping with personal problems. Also, consider whether you may have inadvertently harmed your relationship with him by, for example, being standoffish because you’re consciously or unconsciously intimated or you’re…