Blondizgd saidYou have no sexual desire for him - it's over. Consider it done and move on.
Same thing happened to me with an ex. I work up one morning and simply didn't want to have sex with him any more. Best decision I made getting out of the relationship.
First this is a post from 2013.
Second, worst advice I've ever seen. Sex is not the foundation of a relationship. If you 'woke' up and simply didn't want sex so you walked out you're fooling yourself by what the issues really were. No one walks away from a relationship simply because of sex. 95% of your time with someone is outside of the bedroom. You socialize together, you eat together, you enjoy activities together, you cuddle, talk and touch together, all without sex. Those are the foundation of a good relationship.
To tell someone to dump a guy because you're not finding your sexual needs fulfilled is lame, irresponsible and ignorant at best. Poor advice, very poor advice to anyone.