Astudent blows up a ballon and then places it in a very cold freezer the ballon shrunk after hours why! ?

Temperature is directly related to the speed of the molecules such that as the temperature decreases, so does the speed of the molecules. When the balloon was placed in the freezer, the temperature plummeted and so the molecules moved less. Due to this lack of movement, less space was used by the balloon so it shrunk.

They did not study the continental drift

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now