Less intimacy and impact on sex life.

My partner (not husband yet) says that because of my weight our sex life has been impacted. I feel he doesn't find me attractive anymore. He everytime tries to change my appearance be it my hair, my dressing sense, my spects, my body, my colour and my weight. I am fair, 65kg, 5'4" height. I have been in a relationship with him since 8 long years and now of a sudden all these things have started coming up. I have not been skinny since childhood. When I question about he not being intimate, he says he doesn't feel anything for me and feel kind of disconnected. He then once said he doesn't get excited with me on bed and says this is because of my weight. This kind of activity of him disturbs me and I get affected adversely. It's not like I don't try to lose weight but as I have PCOD it's very difficult for me to lose weight. I am not obese and hence I don't understand why my weight is a problem to him. Please guide me or else I will go mad thinking over this again and again. 😞😓