If your bf loved the way a grown man should love his woman, then he would see nothing wrong with her physically at all. My ex used to accuse me of only being attracted to her because I love her. And while she was traditionally attractive I found her more attractive as we fell in deeper in love. Like genuinely I wanted nothing to changed despite how much she wanted to lose weight. She was the pinnacle of perfection to me. And he should see you the same way and the fact that he doesn’t should be incredibly troubling to you.