It's not as bad as you think. I recently (a few weeks ago) had a meltdown in front of my roommates (who aren't related to me) and they still accept me. A little while after, I apologized for my actions, and they told me it was OK, and ever since have acted as though nothing ever happened. And yes, they both know I'm autistic, and both knew before they voluntary and specifically chose to live with me, though I'm not sure either knew exactly what that entailed. My intuition tells me that they aren't just acting, and sincerely do still like me. Surely, your family must still accept you, especially if you apologize/ have already apologized for the things you've said. If there is one thing I've learned recently, it's that people, family or otherwise, aren't judging you as hardcore as you think they are...
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Not my chair, not my problem, that's what I say.