In the mark scheme, you can use "textual references" rather than quotes. For example, you could say "When Romeo first sees Juliet..." (can't think of a better example - I'm doing Macbeth) rather than saying the exact words. It won't get you a 9 - you'd have to use actual quotes for the top grades, but it can get you out of a desperate situation.
For poems, you don't need to learn quotes from all of them - you just need to know enough about the poem so that if it came up (as in, it was the one given to you), you'd be able to write about it. For example, London (William Blake) is a fairly easy one to learn and could be compared to lots of things (other anti-establishment poems or poems about suffering for example). On the other hand, Tissue (Imtiaz Dharker) is a rather difficult one so you probably only want to write about it if you're forced to, so don't waste loads of time learning it. Just learn enough quotes from enough poems to prepare for every eventuality.
Finally, remember that Language is where the biggest stakes are. If all you want is a pass in Language (say you're not planning to study anything that really depends on Literature at A-level), you might be better off revising methods and analytical techniques - these can be applied to both subjects.