The amount of gifts you would receive would be 78 gift's.
Explanation:
The way that I got 78 was by I added all the 12 number's which would be <em>12+11+10+9+8+7+6+5+4+3+2+1=78 I know they are those number's because each time there was a gift added and it would not be 12 because those where the amount of day's the gift's were gifted.</em>
HI! So this sentence is symbolizing a broken heart after a fight with this girls boyfriend, It just means her heart was broken like glass without use of similie.