My dog has separation anxiety, which I did a lot of training with him for when he was young. After months and months of work with him, this was quite successful and I was able to leave him for up to two hours. I worked at home at the time and my H worked in an office outside of the home. I had to do the training when my H was out at work as he found the separation training boring and wouldn't join in (it involved multiple times leaving the house for seconds then minutes at a time).
H then started working at home during the first lockdown, and our dog was never left alone for the duration of the pandemic due to both H and I working at home. He's never gone back to the office.
Our dog's separation anxiety eventually came back, and now I can't leave him at all - not even for a minute.
My H is controlling and emotionally abusive, and I'm currently making quiet plans to leave. I intend to take our dog with me, but this leaves me with an issue in that, as it currently stands, I'll be living alone with a dog I can't ever leave. I need to be able to leave him so I can go to the gym, shops, etc. Obviously I'll have daycare options, and I can use dog sitters, but for example I go to the gym at 6am for an hour, so it's going to get costly (and not feasible as no daycare is open at that time, and I can't see sitters being willing to come at 6am). I can't even nip to the shops.
The obvious solution is to redo his separation training once I've left H, but my priority is the dog's happiness: I don't want to stress him out. And is it even possible in an 8-year-old dog? Does anyone have any other ideas please? I will be living alone.