AITAH for deciding to postpone the wedding over a comment my fiance made about my scar?

I (female) have a visible scar on the side of my neck. It's been there for over 6 years and no one has ever commented on it or made any negative remarks about it.

However, my fiance would make comments about my scar and make it seem as flirting like for instance complaining he has kissed every part of my body, except my neck because of the scar, and how the scar "looked like a kid messed up such a great art (referring to my look). Etc etc. I told him I didn't appreciate it even if he was using the scar to be flirty with me but he insisted he loves me anyway.

Our wedding is approaching and I've been busy with the wedding planning and days ago, my fiance and I and inlaws were talking about the wedding and was talking about how we're going to finally be married. He laughed and said "I'm marrying you minus the scar" I was stunned when he said that especially infront of his family. I was do upset I got up and walked out of the room. We had a big fight and he kept saying I was being a drama queen and that He said "nothing wrong". He doubled down when I said I'd consider postponing the wedding because of his comment and he called me crazy. His mom said that I'm obviously " traumatized" by my scar to let it ruin my marriage with her son and suggested therapy. She told me that the scar was the issue not her son who loves as I am and chose me to be his wife.

Idk, I really feel horrible right now I don't know if I said the right thing about postponing the wedding and wether I'm overreacting in this situation. My girl friends have previously said that my fiance shouldn't even be bringing up the scar like that.