@sam09 I don't know how you would go about it and may need professional assistance but it's your family who need to hear this. I'm guessing that the emergency is over for them, you're still with them doing everything they need you to do and they're getting on with life (which is kind of what they're supposed to do) but they're not taking you with them in the way you need to be taken. If it was me (and these are big brave words), I would plan something FOR me that would take me out of the family group for a little while - I don't know - a trip insterstate, a small yoga retreat, something... but I would sit everybody down and tell them why. And then go off with as little consideration as to how they are going to make it work as possible. And don't tolerate coming back to a cesspit of a house. And, if you have a great friend who would make it an even better break, plan it with her or him. But it would have to be something that excites you and would not make you feel lonely. I think that's the key. Before BC, I went on a 2 day trip to Melbourne to see an exhibition I really wanted to go to. The circumstances were different, but I went by myself to do something only I wanted to really do. I stayed within walking or short tram/bus distances, spent what time I wanted wherever, lounged in the spa at the top of the hotel, had glass of wine reading the paper in the lounge, read my book at 3am. I spent 3 hours sitting in front of 5 Monet paintings with no-one to harass me. That was a birthday gift from my family but it sparkles like a jewel.
If that all seems to much, then to quote an earlier post, maybe try to find a like-minded group, or 2 or 3 people, with an activity you can look forward to.