Would that mean that rebounds are a healthy way to deal with heartbreak

i 100% agree with this and i have personally observed myself doing that , that based on how someone looks i used to build this ideal image in my head that might not necessarily be true because it is not based on any factual information.

This reminds me of a love cycle , how love changes and takes different form with time

i really do agree with this because i personally have mistaken love at first until i actually started to feel it , which made me realize that what i was feeling was not love and that love is so much more than just longing feelings

i do agree that love is a vague word, however the words she uses to describe what might fall under love, are not enough to describe that love is in my opinion, i think love is more complex it could be more than one thing at a time and it also differs from a person to another