AITAH for telling my daughter I won’t break up with my girlfriend just because she doesn’t like her?

My ex wife and I finalised our divorce proceedings a couple of years ago. I had fallen out of love with her for a multitude of reasons, the biggest being her emotional affair which lasted a couple of weeks. My ex wife did try really hard to save the marriage, but my feelings for her had almost evaporated after her emotional affair. The divorce was painful, but it was also amicable because for both of us our daughter’s well being was our first priority.

I started dating my girlfriend last year, and I introduced her to my daughter a couple of months ago. My girlfriend moved in last month, and I plan on proposing to her at Christmas. My daughter, who’s 15 now, obviously has strong feelings about it and I understand it, but I think she will just have to get over it at some point. My girlfriend is really nice to my daughter, and my daughter hasn’t really had any complaints about my girlfriend, she just thinks what I’m doing is very disrespectful to her mom.

Last night, my daughter told me she doesn’t like my girlfriend, that she’s sleeping in the place her mom used to sleep in, sit it the couch her mom used to sit on etc. She thinks my girlfriend looks very happy because it’s a dream come true for her to live such a nice life, and it’s not fair to her mom. I told my daughter I wasn’t going to break up with my girlfriend, in fact, I was going to marry her next year. I told my daughter she doesn’t have to like my girlfriend, but she will have to get over it.

AITAH?