Wrong for not caring?

My fiancées mom never cared for me. If I did something to make her feel this way I'd admit it. I'm not rude, disrespectful, none of the above. I've always greeted her in a nice manner. Did everything I was suppose to do. Come to find out she never got along with none of his girlfriends. Never liked any of them. And my fiancé is a mamas boy to the fullest so this may be why. I think she's more jealous than anything. Well today my fiancé and I talked about it, and I told him I didn't care that his mom didn't like me. He got offended and said I was wrong. But I feel that if you did nothing wrong to someone for them to feel a certain type of way, why should you care?! And if he allows this to be a burden on our relationship then I honestly want to call it off! Am I wrong for not caring or feeling how I feel overall??

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