I think its an Idiom. I don't see like or as. So no simile. I don't see he is something like a marshmallow. - No metaphor. I also don't see a non-human thing doing human things- the grass was dancing in the wind. My answer would be an idiom.
Hope this helps!
Maybe character vs self???
Summary. Things are starting to heat up—as they usually do in Act 3. Benvolio and Mercutio are hanging out as usual, trading insults and mocking the Capulets. Trouble materializes in the form of Tybalt, who is trying to find Romeo so he can get back at him for crashing the Capulet party.
Answer:
It is possible to have too much of a good thing because sometimes we can’t handle good things all the time. So I do agree that we can possibly have too much of something and not know how to appreciate it.
Explanation: