The reasons for not telling/talking about your M problems are multiple and logical.Do you agree with the coaches advice? I'll assume you do or this would have already told people.
If it is just camping, H could just not feel like camping anymore. I know that could be weak excuse seeing as ye were all pretty close, but in reality nothing you say will stop others wondering. By saying H does not want to come and not elaborate, you answer their queries and place the reason on him.
People are going to think and suspect what they will.UUnfortunately there is not much you can do about that except not to focus on it. Easier said than done but the key is to focus on other more positive stuff.
I have realised that people often place barriers on themselves and don't live their life fully due to these barriers. I stopped doing sport because the only time I could do it during the week without sacrificing time with kids was after 9 in the evening. This late in the day is not ideal as often tired, it is after evening meal and near bedtime when finished. So I decided to do sport this year late in the evening as it was then or never. Not only has this been great GAL (even if I do most if it in basement) i am reaping the rewards physically.. my life was filed with many such self imposed barriers.
My point is your dog is a barrier you have placed on yourself.I am not saying get rid of the dog, but find a way around the problem.Govsonewhere with him, set up a run in the garden so it's not locked up all day, impose the dog on H while you go out........
Being housebound does not mean that you cannot GAL.TThere is loads that can be done at home. Tonnes of activities. Even socially you can telephone a friend, Skype/video conference people, have someone over.
Best wishes
R 25 years M 14 years S11 & S13 Working on it alone since Oct 2014 M in trouble a lot earlier (~2 years) Feb 2016. 1st R chat in a yr. Next R chat Aug'17 Still together