My aunt had breast cancer, I was told by 2 Drs that I can take HRT as long as not sister or mum who had breast cancer. I would start getting some info - book a Drs appt, talk to the council, look at local rents, check bank balance. You have 2 options - stay or go. If you stay, make a new life for yourself. Find a space in the house to make yours. Set it up how you want - chair, TV, pics. Let your OH sort out his own life - shopping, cooking, washing, hobbies and look after yourself. Be a bit selfish - what have you got to lose? Get out and get involved in the community in some way. Maybe a part-time job or volunteer somewhere so you can meet people, or a hobby. Start living as of you were single and see how you get on. Yes there will be compromises, and you need to come to terms with that. Instead of a house you might have to move to a flat if you split up. Only you can let go of your old life and make a new one, and your resources may be limited. You may end up without the dogs, in a smaller space, on your own. Would that make you happier as you won’t have your partner?