Ariel Winteralreadycandidly explained exactly why her body has changedover the last year — her weight dropped after changing up her antidepressants — but she’s still dealing with body shamers whoaccuse her of getting plastic surgery.

TheModern Familystar, 21, doesn’t owe people a response, but she says that it’s important to her that she defends herself.

“If you don’t stand up for yourself, who’s going to stand up for you?” Winter told PEOPLE exclusively at theEntertainment Weeklyand PEOPLE Upfronts partyin New York on Monday night. “Sometimes I stand up for myself a little too much but I’m doing it.”

Winter decided to defend herself last week afteran Instagram commentersaid it was “obvious” she had extensive plastic surgery.

“How many surgeries have you had on your body and face now?” the person wrote, before deciding that Winter had “Two breast reductions, that’s obvious, cheek bone and chin shaving and lip fillers. Pretty obvious, she looks so different #Truth.”

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Winter initially let the rude comment go, but then decided to set the record straight.

Ariel Winter.Ariel Winter/ Instagram

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“They don’t know people, they know them as a persona onscreen that they see,” she continued to PEOPLE. “On Instagram, people see a photo every once in a while or they see something that a paparazzi took — they don’t know that person. It can get really frustrating when you see things that are untrue or things that are hurtful or even some things that private things that don’t need to be out there.”

Winter added: “It’s nice for all of the fans and the supporters who are kind and supportive, it’s fantastic, but people are quick to judge things that they see on the small screen, it’s difficult.”

And there is another problem with speaking out — people accuse Winter of being “bitchy,” though she doesn’t mind.

“People think you’re bitchy when you stand up for yourself,” she said. You know what? It’s not bitchy, it’s bossy and it’s my body and I get to be that way and there’s nothing bitchy about standing up for yourself and being real. I have no problem with it. I’m boss bitch, we’re all boss bitches.”

RELATED VIDEO: Ariel Winter Slams Critics Accusing Her of ‘Squeezing’ Into Her Shorts

Plastic surgery is one of the many things people have accused Winter of doing to lose weight. In January, she had to shut down another criticwho said she was doing drugs.

While Winter was joking, part of her response is the truth —she switched from an antidepressantthat wasn’t helping her anymore andwas making her gain weight, to a new combination of medications.

Winter said that she’s feeling much better now, but admitted tomissing some of her curves.

“While I feel better mentally with the change, and it’s nice to work out and have your body actually respond, but I want to gain a few pounds of muscle and get healthier,” she said. “Also want my butt back…”

source: people.com