No sexual life

So what do you do when you and your partner who are married and raise children together do great at life, have fun, love each other, be there for one another, but do not have sex. Not optional for one of them, meaning one really wants it, but the other doesn't. Over a year of trying things, but nothing seems to click to the point where they are currently sexually incompatible. What can you do? You don't want to separate, but you can't continue with no sexual activity. What options do you have? (Besides therapy, which has been tried)