I can relate to this, I can of fell out of riding for a while this summer. I still rode jst not nearly as much and I didn't have the uncontrollable urge to ride all the time. It kind of all started when I had a bad ride and failed to complete a double century, I became very discouraged but thats another story. I just took the time off and waited for it to come back. One of the things that helped was in fact getting a fixed gear because it gave me a different perspective and also getting a bmx bike. It gave me different ways to be on a bike and kind of helped me get that urge to be on a bike again. I'd say just give it time and it will come back eventually.