-"Now I'm out of time, 'Cause I've been wasting it all on you, My heart is broke, But I have to fight to pull through"
In the first line, "time" is personified, as it is depicted as something that can be run out of, or wasted.
In the second line, "heart" is personified, as it is given the action and feelings of a person. It is described as being broken, and that the owner must fight in order to endure the pain.
-"Your words cut me like a knife through me"
This is a simile, as it compares the effects of the person's words to a knife cutting through something.