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A relationship is not one-sided, and you should never feel resentment for the things you do to be a good girlfriend. While not everyone can do all things equally, you should be on equal footing in your relationship. They should support you, and care for you, too! A lot of middle school relationships might start out with playful teasing as a form of flirtation, and that's okay. However, don't let innocent teasing become back-and-forth bullying. A relationship where two people are mostly mean to each other is not healthy. If your partner is mean to you on a regular basis, avoid being mean back and say something like, "If you don't stop saying those things to me, I'm not going to be your girlfriend or your friend anymore." If you want to break up with the person you're dating, it's better to tell them directly. Cheating on them to avoid having a hard conversation will come off as cowardly. And if they did something to make you mad, don't cheat on them in order to exact revengeit will only make you look bad! Even if they cheated on you (or threatened to), it's not okay to cheat on them! If you can't talk through your issues, it might be time to break up. Avoid saying mean things about people they care about because doing so might cause them to push you away. Be supportive of them and the people they love. And if you don't really like their friends, don't hang out with them and keep it to yourself. If they invite you to hang out with them and their friends and you're not sure whether you like them or not, give them a chance. Try to find something you have in common and go from there. If anyone they are close to (from their grandmother to another friend) is mean to you, feel free to share that with them. They might be able to talk to that person, or they might realize that someone they thought was a friend is not so nice. If other couples your age are doing physically intimate things you're not ready for, don't force yourself to do those things to fit in or "please" them. It will only cause you to feel resentful and lead to a sour breakup. If the person you're dating is pressuring you to have sex or take drugs, you should tell them honestly if you don't want to (if you're not ready or that's not something you're into). A good partner will understand and respect your decisions.
Remember that you deserve all of these things from your partner, too! Don't be mean to the person you're dating. Don't cheat on them as a way to break up or make them mad. Don't criticize their friends and family. Don't give in to peer pressure to act a certain way or do certain things.