Here is the general rule:
A simile always has the word LIKE in it for example she is like a cloud.
A metaphor is exactly the same as a simile except that you don't have like in it.
Hyperbole is when you exaggerate something for example, the bag weighs a ton
Symbolism is for example summer representing happiness or winter illness etc etc.
Now you tell us :)
A Metaphor and could be Symbolism but it depends on how its used.