I (35, F) am dating this guy (42, M) for about 4 months now. Prior to me, he was with someone on and off for 4 years. They broke up "officially" about 2 weeks before he met me. A few weeks after we started dating, I found out that he's adding her to his acknowledgement of his book that he's been writing for 9 years and will be releasing it in the next 6 months or so. I felt uneasy but I understood that she was there before me and that I had to accept it. He then decided to take her name out of the book because he said, "if it makes you feel uneasy, I want to fix it and so I'm taking her out of the book." He told me he was hesitant about putting her in there in the first place. It caught me by surprise because it wasn't a big deal and I didn't ask for him to do that but I gladly accepted and felt better about the situation. A few weeks goes by and we got into a stupid argument and out of spite, he yelled, "you know what? I'm going to add her back into the book!" And so he did. He also stated to me that "she's better than every guy you've ever dated combined and she deserves to be in the book". Mind you, this chick's last words to him were, "I fuxking hate you". His reasoning for wanting her in the book is because he promised her she'd be in there and that he's a man of his word (insert eye roll). I don't think it's a good enough reason to fight so hard to have someone you claim you don't care about to be in your first book. It's as if he's still trying to protect her feelings even though it's driving us apart. He tells me he wants to marry me one day but then also told me he was going to marry her because it felt like the right thing to do. I feel like he's still choosing her over our relationship. We've had many talks about this and he knows how I feel because all he could do is defend his reasoning for his decision but not truly acknowledge my hurt over this. I'm just hurt that he still defends her and wants to immoralize their relationship and that's why I don't want her in the book because I feel as if he still has feelings for her. He's suppose to get his first copy of the book tomorrow and it's all becoming a reality. I told him that it's going to get worse before it gets better and that it might take me a long time to get over it. I also told him that I hate that I can't support him like I should and it's bothering me so much inside that I can't even be excited for him especially knowing that his book has caused me so much pain and heartache. Am I right for feeling this way or AITAH??