Is my boyfriend out of order?

When we started dating I weighed 12 stone 5, I got down to 11 stones by christmas and couple of times he would grab my bum and hips and ask if id put weight on. This then triggered back my anorexia with bulmic tendencies. He knows all about my past illness which resulted in my ex husband having to have 2 of my kids living with him. I was previously 19 stones and dont want to get there again. Ive now got down to 9 stones 2 and he says ive hardly got any breasts and my legs are too thin. Ive now been ordered to put on 8lb by the end of july otherwise he is leaving me because he doesn't find skinny women attractive. He is 23 shots stones and I dont pass comments on his weight because I love him for the person he is. Am I wrong for being upset but I cant just snap out of it likes he thinks I should. By the way im 5 ft 4, size 8 to 10 and 32b chest. Thank you in advance