@kermitsolvestheclimate. How are you kermit? Did you go in the end, or stay at home?
You very obviously need more - or even, some - support in your everyday life, and that is not me judging you for your parenting. I have 3 (adult children), one of which has extra sn, but not thought to have ASD. As you probably know, life with nt teenagers can be a nightmare, particularly if they grow taller and stronger than you, add in a sn to that dymamic, and I would challenge any parent who has to do the majority of the care and guidance on their own, to not sometimes have their own meltdown. I know it is hard when you feel so broken kermit, but please reach out for help, your husband and GP are the first ones that need to know how exhausted and worn down you are, then your son"s specialist, and any other family and friends that you feel able to share your emotional pain and physical exhaustion with. Many families who have a child with mental health problems get offered respite, but I don't know if that happens with children on the AS, I can imagine it would be very difficult as an ASD child would probably find the change horrendous, which would of course be cruel to the child, but would probably make his family so upset too, that it just couldn't be done. So to me, the best solution that I can think of is can your DS either go and stay with Grandparents for even a few days, or an Aunt or Uncle, or close friends that he has known all his life? I don't mean while the rest of you go on a holiday that he is excited about, but that if you can get a lot more help from loved ones, particularly your DH, and hopefully some help and guidance from specialist agencies, and other families with children on the AS, then hopefully you would have enough reserves available for the whole family to go on holiday together, and for you all to be able to actually enjoy it. If none of that is possible, then I do think that your DH needs to take both children away on his own a few times a year, or even better maybe, you go away somewhere on your own, or with a friend, every so often. The fact that you need a break without either of your children occassionally is screaming out to me. Please try to make some changes that can give you both ongoing support, and the occassional complete break 💐