Psychology question

Is it considered cognitive dissonance if, for example, I don’t like this person because he’s very irritating and I’m always thinking unkind thoughts about him although I don’t show it outwardly and just try to avoid him, but then he goes and does a nice thing like send me flowers when I’m sick, causing me to feel majorly guilty and wondering if I should try to stop disliking him?

Cognitive Dissonance