Sorry PinkCosmos didn't read all the posts (didn't load for some reason). If your still reading it is clear you aren't going to leave him and you probably already expected most of these answers. However, still I am still concerned you and your husband are heading for a financial disaster with the house. No guarantee you will be able to downsize (cost of buying and selling), you might not be able to secure a decent remortgage and when the current mortgage matures the bank will be happy to take your house and sell it at a loss to you. So a possible plan.
Step 1 sit down with your husband again and talk. Tell him your fears for your future. You are married so all money is joint. The savings are as much his as yours. When he is frittering away 'his' earnings that's your money he is spending!
Step 2 review your finances together and think about what you will need in retirement. This review by Which could be very helpful. (Note it assumes you own your own home.) Get your husband to look at it with you:
www.which.co.uk/money/pensions-and-retirement/starting-to-plan-your-retirement/how-much-will-you-need-to-retire-atu0z9k0lw3p
Step 3: make a plan to pay off the mortgage. So talk to the bank about remortgaging (as suggested already). Use the bulk of your savings to pay off a lump and then arrange a repayment mortgage for the remainder for as short a time as possible, say 5 years. As your equity is so high you should get a really low interest rate so this could even save you money!
Hopefully you can get a plan that gives you both financial security at this time of life. Then you can stop worrying about his spending and start enjoying his 'zest for life' again.
Elderly fellow gran has become loudly racist