Keep gaining and losing the same few kgs in recovery - how do I accept the need to maintain?

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basically what it says. my parents want me at a certain weight. I still feel it's slight unnecessary and I'm better a few kgs lighter, but I accept it's better to be able to do activities at the higher weight. my problem is Everytime I get to that weight I go back down again to "my" weight, as I don't notice any issues and bmi wise it's still really good. how do I accept the need to maintain a higher weight and not go backwards

oh and I can't chuck scales sadly

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