Just one thing on his mind. Help!

I am a 53-year-old woman and I have much less interest in sex than my husband. This has been going on for quite some time. None of my doctors seem to understand the toll this has taken on my marriage. I need some serious help before my husband ends up divorcing me after a 30-year relationship. He has just one thing on his mind. Is there an answer for me? Please help. I don’t know where else to turn.