It seems like she is speaking to a lover/friend who she is with who has changed along with her over time. She keeps saying they haven't met yet, because who they were before were just dreams of theirs. Staying in a relationship with anyone over time will produce some changes to those involved.
I think she's saying that when they sleep, they are who they were once or who they think they want to be. But, when they're both awake, they return to the reality that they are both different now. They don't even know each other. But, at least they can still dream that they do.
It seems like she is speaking to a lover/friend who she is with who has changed along with her over time. She keeps saying they haven't met yet, because who they were before were just dreams of theirs. Staying in a relationship with anyone over time will produce some changes to those involved.
I think she's saying that when they sleep, they are who they were once or who they think they want to be. But, when they're both awake, they return to the reality that they are both different now. They don't even know each other. But, at least they can still dream that they do.