Dreaming of blush or blushing means embarrassment and minor setback. Whatever you have been planning for, may not necessary play out as envisioned. The diversion will be minor, and you will be embarrassed by the moment. However, continue to set your mind and eyes on the goal.
Understand that failure and rejection is a part of life. Anyone who says that they have never blushed is a liar. Brush off the minor setback off your shoulders and carry on.