Difficulty with elderly husband

I'm 73 and my husband is 74. He worked for the civil service and so retired at 60. Since then, he hasn't worked at any other job. I also am retired and yet, although we have more time than ever, our lives haven't changed for the better. Since retirement, there have been several crises when I find his behaviour difficult. It's as though life literally stopped for him once he didn't have the job, which was in conservation, very much outdoors, dealing with visitors and the wildlife of nature reserves. However, now he goes out every day, but only to charity shops and bookshops, but he will not walk in the country, so that if I want a country walk I would have to go alone. He says he's a naturalist and has built up a large store of books on the countryside and wild life yet he never sees the countryside even though we live in Somerset. Last year, I discovered he'd secretly been buying art books and had spent money we couldn't afford on them, bringing them in when I wasn't around. He received some counselling over this but it petered out and there was vague possibility that he may suffer from Asperger's syndrome. When I try to discuss the problems as I see them: claiming he's a naturalist without ever taking a walk, and claiming art now his main subject, but refusing to visit an art gallery, we quarrel and I only end up feeling as though everything's my fault. He's at present waiting for a new referral to counselling, but in the meantime he constantly says 'I'll tell my counsellor', as though it's me who is the big problem. I'm in danger of getting depressed, though I try daily to keep busy and keep from thinking about the problems all the time. We had no children, though I have two sons from my first marriage.