Ok, hands up I haven't RTFT, however, please indulge me while I tell you this... many years ago I was in a serious and very long term relationship with my then DP. I was actually at no stage of our relationship, over weight but my weight and shape fluctuated over the years, especially since we got together when I was a mid teen and stayed together until I was nearing 30. Over the years, due to his comments and gradual withdrawal of physical affection and then all intimacy, my body image of myself and self esteem eroded to the point where I felt permanently inadequate. This affected me in such a profoundly negative way that even to this day, many years later, I have body image issues. His comments were more nuanced than your BF's overt distain for you going from being very slim to slim (!!) and less obviously controlling than also attempting to control what you should eat when he feels you are under his view of your ideal weight (both HUGE red flags), but making comments such as "I'm not trying to be unkind, but I can't help it if I don't find you attractive when you are heavier", chipped away at my opinion of my body and my worth. That shit takes YEARS to repair and I'm not sure it ever, ever, fully does.
By contrast and as a reference to compare, my now DH of over 10 yrs, fancies me, desires me and downright adores my body in whatever form it takes. We have been through 2 pregnancies and subsequent births, breast feeding and all the joyous changes these seismic events have on a woman's body(!). When we met I was extremely physically fit and slender, strong and lean. I gained 4 stone during each pregnancy (and gradually lost it each time afterwards) and at one stage after the birth of our second child, I dieted to the point of being fairly underweight. This was the only time he ever commented, with some (reasonable) concern regarding my weight / appearance and even then was supportive in that he knew that I actually was so proud and pleased with myself in my (slightly overly 'succesful') weight loss postpartum. I am currently a good 1-2 st over weight following a year of poor health and DH couldn't give a toss save for my health and how I feel about my body ie cheesed off that nothing fits!
Anyway, what I am trying to illustrate to you is this;
- Your BF is attempting to be controlling of your eating by using shame inducing comments. This is all kinds of things but the most relevant one is that it is BIG RED FLAG. It is unlikely never going to change.
- When you are with someone who feels about you the way you would want them to, they won't give a good god-damn about you losing or gaining a few pounds or quite likely several stone!
Please listen and leave this relationship. As some wise person once said; when someone is showing you who they are, believe them.
All the best lovely.
MOLM