Um i need advice...

Ok so recently ive moved into my dads house after being a victim of maternal narcissistic abuse, im 16 and I weighed 36 kilos due to not being fed and the conditions in my previous household. I moved just over 8 months ago and ive gained weight and now weigh 41 kilos. But my boyfriend of just over 1 year just randomly sent this.. and he keeps making me feel self conscious what am i meant to do? He’s usually amazing and loving but he’s been different 😕