MissusMac if you're having other issues, that's a perfect excuse. Whether it not its an issue for him, it's most definitely an issue for you. If he won't take you seriously perhaps a counsellor might get through to him. He's in a marriage, he is therefore obliged to consider your wants and needs, otherwise what kind of a partnership is it.
And can I also say, if this issue has been going on for months, and it hasn't just gone away, then it's not going to go away. It will keep reading it's ugly head until it gets resolved one way or the other.