<human>: Could you distill the essence of the text into 1-3 sentences?

Hey :) Sorry if this is the wrong place to post this, I just figured y'all might have some insight... And sorry for the wall!
Ok. So I have been dating my current SO for 6 months and up until a week ago I thought he loved me for me, was attracted me to me and happy overall. But he just sat me down to tell me that since he is putting himself on a strict diet and work out plan, I should too. Because "he will no longer accept second best from a partner or himself".
Now, I am a bigger girl and he knows my insecurities and that I would be much happier if I lost the weight, so from that angle I appreciate his honesty and motivation. But when I told him, to sort of defend myself, that I am not a stranger to compliments or attention from men (so I figure I must not be awful looking!) he claims that not one of the men I've dated or slept with hasn't thought I was too heavy and wished I was thin. 
He tried softening the blow when he saw me upset by saying that he thinks I'm so close to perfect. Complimented all the things he loves about me but thinks that if I lost the weight that would make me perfect. AND would give me the "secret to keeping him forever".

I just don't know how to respond or feel attractive around him now. How do I get naked now?!
<bot>: Boyfriend just told me I need to lose weight and neither he or anyone I've been with romantically or sexually has genuinely thought I was attractive.