My boyfriend(39M) says I’ve(40F) changed too much and I am no longer his type. I don’t know whether this should mean the end for this relationship?

My boyfriend(39M) and I(40F), have been together for 8 months. We attended the same yoga class for a few months, and when he first approached me a year ago I was beginning my fitness journey and was at my highest weight(210lbs). In the beginning, he stated so many times how I was his ideal type, how gorgeous and desirable he found me, etc. Our sex life was very active and he was constantly initiating, just healthy normal things. From the beginning, I told him that I was planning to lose quite a bit of weight, and he always stated that it wouldn’t matter because I would always be gorgeous to him. Along the way, we fell in love and have had a such a deep connection.

Since that first meeting a year ago, I have lost 65lbs. I look and feel great, have regained my health, gained a lot of muscle, and am finally back to where I want to be. The past couple of months, however, things in our sex life have really shifted. He used to be all over me, aggressive in bed(in a great way), and we had sex many times a week. The past while, he has totally changed. He barely wants to have sex, lacks the same enthusiasm, and it almost at this point seems like something he does that’s just expected of him. As soon as I noticed this happening, I asks him about it, trying to understand whether it’s me and if he no longer finds me attractive. He insisted that I was being silly and it had nothing to do with me or how I’ve changed, but he’s just not feeling very sexually motivated lately. I accepted this answer and said that I’m here and I don’t have an expectation, hoping this was just a transition period for him of some sort.

Well, several days ago, he said that there’s something we need to discuss. He said that since we first met, I have really changed, and I look like a completely different person. He apparently didn’t realize how much it was affecting his sexual attraction to me, but apparently it does in a big way. He said that while he is still attracted to me, it’s a lot less and that means that he will want to have sex a lot less. That he’s really sorry but he can’t help what he’s attracted to, which is bigger women. I am really confused, because I feel like once you love someone, it becomes less about them being your type and more about the connection between you. It’s about the intimacy with the person. I also don’t really get it because I feel like you either want to have sex with someone or you don’t. Like is there a grey area? You want to have less sex specifically, rather than just not at all? He insists that he finds me so beautiful and gorgeous and he loves me, he just doesn’t want to have sex with me as much because I’m no longer bigger. I don’t know what to think. It doesn’t really make sense to me and I want to ask whether this seems like a common thing and whether it’s worth staying in this relationship.