No, your ceramic candle holder should not get hot when the candle inside is lit. Ceramic, as well as other types of pottery, is an extremely poor conductor of heat. In order for it to get very hot when a small candle is lit, the candle would have to be lit for a very long time, essentially burning down to its base - and even then, the ceramic should only get warm at best. However, consult with the maker of your specific ceramic candle holder to be completely sure that you’re using it according to manufacturer safety recommendations.