Boyfriends mum

So I'm not like fat, I'd say I'm curvy. My boyfriends mum always says that I have put on weight and she always comments on what I eat and drink, but she is so unhealthy! She literally just eats junk throughout the day and rarely has any meals. One time my boyfriend offered me some chips, she came in the room and was like "she needs to lose weight" and then she started eating them with him. She's not so "skinny" herself and her daughter is overweight so why pick on me about it? Ughhhhh 🙄
She probably doesn't mean anything by it but I'm starting to lose my confidence now! 😔