Girls, what will you do if your boyfriend says he likes his girlfriend to be on the chubbier side but you're on the slim side?

So I am 33-24-33 , height 5"5 , weighing 45-46kgs, I have always been on the slim side, and I struggle gaining weight. It's a huge task for me to gain weight and extremely easy to lose weight. Anyway so my boyfriend of 6 months since the beginning of our relationship used to ask me to have more food and to gain some fat while I really didn't think a lot of it , we had a conversation last night where he told me that he prefers chubbier girls over slim girls, so this caught me off guard as I really didn't know that he had such a preference. And no guy has ever said something like this to me. I'm worried whether if he actually finds me attractive or not, because I definitely don't fall under his "preference" . Even if I have to change my physique to be on the chubbier side , I may have to gain at least 7 to 8 kgs which is extremely difficult for me, how can I deal with this situation?

Girls, what will you do if your boyfriend says he likes his girlfriend to be on the chubbier side but you're on the slim side?
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