Hard to have MH isssues I agree. But also hard to be a family member of someone with MH issues, who is painting you in whatever way they experience you, but inevitably through the distorted prism of their MH issues, which may be a very one sided and disorted picture. I have had experience of this.
So therefore we don't really know what SD has said, how he has said it, or what he wants OP to do. Only how she has interpreted it.
I don't feel she has come on here to listen to advice and maybe try to put it into practise, but to vent her issues.
When the sympathy of the thread seems to veer more towards the poor fucking dog, she drip feed another little bit of information. "Oh but I am agrophobic", "Oh but the dog (which I adored and cared for for seven years) is boisterous" This OP will "Oh but" until the cows come home.
She does not "adore" the dog, or she would try to find a solution. Then saying that she might as well let SD come and fetch her so she can sit in his house all day and not feel guilty, is a PA way to both manipulate the reactions on this thread, and possibly the reactions of SD. I think this is a two way game being played.
Unfortunately poor MH can made some people incredibly self centred, manipulative and selfish, and very lacking in insight. And basic personality makes people with MH respond differently to the same illness. I have worked professionally in the field of MH. And sitting at home looking at four walls may make the OP feel in control of her agrophobia, but it is never going to help her resolve anything.
Not everyone with MH issues is selfish, please don't think I am saying that - and best wishes and congratulations to the PP who takes her kids to school every day despite her illness, because she does "adore" them and puts their welfare first.
And while all this shit is going on, the poor dog suffers in the middle of it, But that doesn't matter while some human can trump all with "MH"