How can I stop my younger sister being mean to me and thinking she is better than me?

Quite being a doormat. People will do to a person only what that person allows them to do. You allow her to bully you, so she does. You're 20, so act like you're 20. Quit being "a sensitive person", but a responsible adult. As long as you whine to your parents, she knows she has your number. Quit hanging around the house when you're home. Go out with your friends, and totally ignore her. If she starts to pick at you, push her out of your room and shut the door, but say nothing. Don't respond to her taunts. If you really want to reverse what's going on, start subtle criticisms such as looking at her and saying, "Gaining some weight looks pretty good on you" or frowning and circling her and then shaking you head and walking away (silently). Ignore her questions about what you're doing, and keep doing it. Shake your head as if disappointed in something, and then walk out of the room. It will drive her crazy to not figure out what you're doing. Just a thought.

I had a similar problem but with an older sister.

I sent her a letter detailing everything that was wrong in her life that she needed to sort out before she could possibly be judgemental about me and my life.

All the criticism and sanctimonious, self righteous behaviour stopped.

Dude. You're the man. Put her in her place.

Sir, let me give you an excerpt from one of my favorite books. Keep your love on by Danny Silk

The aggressive communicator has a core belief: “I matter. You don’t.” Aggressive communicators know how to get what they want. They are large and in charge because they are the biggest, loudest, and scariest one in the room. Sometimes, they are also the most fun and charismatic person in the room--but in a way that lets everyone know that their thoughts, feelings, and needs are the only ones that matter.

It can be difficult to enter a conversation with someone with this unhealthy style of communication for obvious reasons--it’s no fun to be the target of their anger or aggression, or shut down by their huge ego. But aggressive people need to learn to let the people around them be powerful--and in so doing, to open themselves up to the possibility of having a real relationship.

Here are a few tips for dealing with an aggressive communicator:

•Set a firm limit by saying something like, “I can only talk with you when you decide to be respectful.”

•After setting this limit, be prepared to walk away immediately from the conversation unless it returns to a respectful place.

•Remember it is your job to say what you are going to do. It is not your job to control their behavior, force them to stop, or convince them how damaging their behavior is to your connection.

•Be prepared to set this limit on more than one occasion.

•If aggressive communication ever becomes harmful or dangerous, make sure to get immediate assistance. It is never ok to allow yourself or others to be hurt or abused by someone unwilling to change destructive behaviors.

Ignoring Her

nnaybe you should stay sonnewhere else and visit your parents fronn there

Well, first of all, she tells you what to do like she's older than you because YOU LET HER. Not sure why you even pay attention to her.

And you are reacting! You tell your Mother about it, you're complaining here, so i'm going to assume that you react negatively toward her or about her comments when she says things to you

You're just giving her fuel to continue. It's like tossing gasoline onto a fire

STOP reacting! When she says something condescending, you have choices. You can either have a hissy fit or immediately smile, be calm and as you're smiling say something like:

"oh, sorry you feel that way"

or

"i hope you start feeling better soon"

or

"I love you anyway"

or

"Wow! We are having such nice weather, don't you think?"

or

"by the way, how is school going?"

In other words, come back with a positive response, or one that has nothing to do with her stupid commentary. And SMILE! Then, after you say whatever it is, turn around and go about your day. If you're in a situation with other people, just start talking to someone else after you comment to your sister (and smile at her) .

You don't realize that your negative reactions please your sister. So start reacting positively or just be neutral. Always be pleasant. This way, you're getting the upper hand.

By the way, neither of you are "adults". An adult would have figured this out by now.

I find it odd that your sister can make you feel things, you probably don't want to feel. That'sFucked up. Issue some emotional control!

If you do as i suggest, it will only be a matter of time before she gets bored with it all. And if she stops doing it for while, just remember she might still try it once in a while. So just act as if you're unconcerned. Honestly, i don't know why you're so concerned about her behavior anyway. She's acting like an idiot, which, in turn, causes you to act like one. You don't have to

a swift kick in the tw*t will bring her back down to earth

"I’ve tried to talk to my parents but they won’t do anything about it."

First, for your own sanity, be sure you aren't making things worse. I had a younger sister who acted much the same way, but by the time I was in college, the last thing I would have done was run to mom and dad. If she's aware of this, in her mind it's a "win" for her.

The other thing is, you're probably sending signals that this is getting to you. This is the worst thing you can do. You need to find better responses, and there are lot of them. One is burst out laughing. Another is ignore her. Throwaway comments work well. "Aah, the brain of a 16 year old!".

The point here is that you are encouraging her with your responses to this. Change that, and she'll adjust accordingly.

Her behavior will likely stop itself as she matures and realizes she's been a teenaged brat. But for now, just realize that she behaves like a child because she IS a child.