If you separate, but don't seek help, then what have you accomplished. Make an appt. Your H's problem may be medical. In the 50s hormone levels in men decrease. He may also have a lot on his mind about work or may be depressed.
First step is to check it out medically.
He works very hard and uses this as an escape from worries, but this is affecting our sex life. I think he knows, but want do anything about it. This is really getting to me and if I say anything he says to use a sex toy. He use to say things to me during sex and wanted me to enjoy it , but now he acts like that's not important. The only comment that he's made is that he guesses he's not as sexual as he always thought he was.