Am I wrong for asking my boyfriend to rehome his dog because it reminds me of his ex fiance and their past together

Sometime back I found out that my 2+ years boyfriend was talking to his exfiance behind my back for a few months. I made the choice to continue with our relationship. We have had ups and downs since then. One of the things that makes me think about it so much is his dog. He bought this dog for his ex fiancé that when they broke up she didn’t want to take with her. So when I met my boyfriend and told me the story that she didn’t want him I welcomed the dog with open arms. But during the messages between them behind my back, my boyfriend sent her several pics of this dog and would refer to him as “our boy.” Since then, it bothers me, every time I look at the dog it reminds me of her, and I don’t want him in our house anymore. I asked him to please find a place for him because it really causes me to want to throw up every time I see him. Am I wrong for asking him to find a place for this dog? I’m just so hurt 😢