How to Avoid Negative Feelings of Not Being Able to Feel the Holiness of Shabbos:

From B'yam Darkecha on the Beauty of Shabbos & the Yomim Tovim: R Yossi Michalowicz by R Yossi Michalowicz.

pp. 290-29: Know that hashem is waiting, yearning, and longing for your success. Know that every day is a brand new opportunity for a brand new feeling of connection to Hashem. WHAT DO YOU DO WHEN YOU ARE HAVING TROUBLE IN FEELING THE LIGHT OF SHABBOS ? Sometimes Hashem withholds the light in order to test our true intentions of why we want to experience the light; and to enable you to reach "essentially Deveikus" which is altruistic. Understanding the joy of serving hashem with loyalty and no ulterior motive, when the light manifests in suffering.