betray (someone's) feelings

Translations
предать (чьи-то) чувства
He betrayed her feelings by ignoring her completely.
Он предал её чувства, полностью игнорируя её.
Definitions
To act in a way that is disloyal or unfaithful to someone's emotional trust, often by revealing their private thoughts or emotions to others or by acting contrary to their expectations.
Words
feeling

noun
чувство
betray

verb
предавать