You're more than I can believe would ever come my way

from The xx – Fiction Lyrics on Rap Genius

Meaning

Even though the dreams of his lover feel real, one thing reminds him that it can’t really be: his lover is “more than he believes would ever come” i.e. his dream lover is way out of is league.

Or, he might be referring to his lover in his dream. The lover in his dream is already more than he expects to have. He believes there is no way they can be together in real life, so he is satisfied just having dreams of his lover.

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