I'd go with pathos, being nervous really isn't an emotion but it's similar towards fear and discomfort, and so pathos are associated with emotions.
There is no comma needed!
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An inference is an idea or conclusion that's drawn from evidence and reasoning. An inference is an educated guess. We learn about some things by experiencing them first-hand, but we gain other knowledge by inference — the process of inferring things based on what is already known
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The answer is: Unrequited love