Comments on weight - AIBU?

[Littlemissindependent]

I'm not sure if this is more of a WWYD really, but looking for advice...
DP has made a couple of comments over the past month or so that hint at his dislike(?) of potential weight gain. For example, I made a silly comment about gaining 3 stone and he promptly replied that if I did that he'd chuck me. Yesterday, again, I made a joky comment about "getting some meat on my bones before winter" and he was very quick to tell me not to. He's also pointed out that I could do with going to the gym to tone up my stomach and thighs. Here's the thing, I weigh 8 stone . Granted, I probably could do with toning up a bit, but most people I know tell me I'd look better for putting some weight on, not implying that I need to keep it off. I'm a bit lost for words as to what to say to him...

Yeah he's disrespectful

He shouldn't be making you feel like this

The skipping meals isn't a regular thing, more trying to find time to stop and eat when on my own with a 3 year old. I suppose I'm just shocked more than anything because nobody has ever made that sort of comment to me before, it's always been very much the other way with people telling me I'd look better with a bit more weight on.