am i just lazy? (tw for disordered eating + lack of self care)

ive been counting my calories a lot and my mom and her boyfriend (I call him my stepdad bc he's been with her since I was 7) both know and kinda make fun of it.. like my stepdad'll make comments like.. idk here's an example

"ugh that cake was so good I regret it so bad"

"well you know what they say, food tastes better the second time around haha"

"what?"

"binge n' purge n' binge n' purge" (he kinda chanted it?? it was weird..

so he knows and then he says stuff like that and then he'll see me counting calories at the store and he's like "it's be so much easier to lose weight if you weren't so lazy" and then other times he'll poke me in the stomach..

and then he has a Google tablet by the dinner table and it cycles through a bunch of family photos and I just want to cry every time I see a picture of myself on it and I've said that a lot and then I said it again last week and he was like 

"yeah.. I was gonna take those down but then I was like "nah" so I kept them up."

"oh. can you pretty please take them down?"

"nope. its good motivation"

idk if I'm being sensitive or not.. advice is welcome and appreciated :)