Some people are getting way too worked up over the wider reading aspect of this paper. In my opinion, the best thing is to learn some extracts that cover a good range of themes, while also making sure that they cover the whole 'through the ages' aspect of the paper. This allows you to make sure that you can compare and contrast different language styles, form, structure, context, themes etc all within extracts that you are extremely familiar with. It's important to remember that the wider reading you bring in doesn't have to cover the same theme of love as the extract you're given, you could contrast the different styles that the writers portray love through their imagery, for example, or how modern readers could interpret an extract differently to an older one.
As someone said earlier, English Literature isn't a particularly revision heavy subject, other than making sure you can discuss the structure, language techniques etc. The most important thing to do would be to practice your essay writing and how to analyse unseen texts. This way when you get into the exam you will feel far more confident that you are going to be able to analyse and discuss the extracts you're given. The more you practice your essay writing the easier it is for you to get your essay to flow as well, which will be beneficial in the exam. It also helps you to learn how to make your points concise, reducing unnecessary 'waffle' in your answer.
Your analysis of the unseen texts will gain you far more marks than bringing in some wider reading. Just learning about the different time frames that literature was written in and discussing that briefly will give you some marks, and that is something that is usually given to you above the unseen extract. This small piece of information can be extremely useful in giving you ideas, make sure that you read it and make some notes around it.