Children of abusive parents often spend lifetimes, even into adulthood, unknowingly still seeking their parent’s approval. It’s a hard habit to break, for one, and for another it’s also a fallback position when life gets hairy and weird. Being under their roof is understandably a pretty big trigger I expect.
I would remind you of something you already know but may have lost sight of, as an adult whenever you are seeking approval, no matter how it appears on the surface, you are really seeking your OWN approval. The beauty is you have the power to give yourself that! I think your ambivalence is the ‘tell’, that you’re already aware. It’s pretty challenging to manifest that, and not the old ways, when you’re in the circumstance you find yourself in. Cut yourself some slack, go easy on yourself, lighten up a titch. And remind yourself you’ve done this work already, because I suspect you have.
Part of the ‘old ways’ is surfacing as resentment, you’re there, he’s not, yet he’s getting credit somehow. Resentment mostly always stems from expectation, ‘if I do this, I can expect that’. This thinking is a trap, as you well know, I think you can feel it’s misguided, exactly because you’ve already evolved past this and are just regressing a little.
Mostly you need to be reminded that you’re doing as you are, because of who you are. Not because of who your brother isn’t, and not because of need or circumstance. No. You are doing as you are, because of the good person that you fundamentally are, we can all see it, please don’t you lose sight of it. You’re doing this thing, because even though, it’s hard, brings up old feelings, can cause old resentments to surface, etc, you could not do otherwise. I hope you’ll take a deep breath and let go of any resentment the should crop up and just give yourself permission to be awesome you, freed from ANY expectations!
I feel for the difficult situation you’re in, and send you my sincerest Good Luck!