Is it worth it?

Never return to an old love no matter how strong it is 

because its like reading a book over & over again when you already know how it ends ♥

But when you read it a second time, 

you'll notice contents that you have missed when you read it the first time.

So the question is should you?

What about those books which you can read over and over again without getting bored eventhough you know every single part and even the words they say. Every detail. 

But is it still worth it?