From the album XY
This is about loving someone whose addiction is a third person in the room. The drugs aren't background. They're the only place he goes that she can't follow. She gets high with him because that's the only version of intimacy left, but it's killing both of them.
I feel I've never really seen you / No one takes as much as you do
She's talking to someone she's close to but can't reach. The double meaning of 'takes' does the work. He consumes substances and he takes from her emotionally without giving back.
It brings out the best when we're hallucinating / Please don't get too deep with me, I'm suffocating
The sharpest contradiction in the song. Getting high together is the only time they connect, but the second he tries to go deeper emotionally, she shuts down. Intimacy only works when they're both chemically altered.
Laying on you, wanting on you is not enough / So we get it undone, fill up our lungs to open up
Physical closeness doesn't work sober. They have to smoke to feel anything. The phrase 'get it undone' could mean undressing or undoing the emotional walls, but either way it only happens with substances as the intermediary.
Ask you where you've been, you said you just got back from paradise / I was waiting for you, but you left me for the moon last night
He disappears into the high and calls it paradise. She's left behind in reality, waiting. The moon is both literal (he got too high to show up) and symbolic (chasing something unreachable). The repeated 'you're still fucked up' stops pretending this is romantic.
We getting, we getting, we getting lost in pastel skies
Pastel skies sound soft and beautiful, but 'lost' is the operative word. They're not exploring together. They're disappearing. The druggy haze is color-coded like a dream, but the song knows it's erasure.
The pastel skies are beautiful and they're a graveyard. She knows he's still fucked up. She knows getting lost together isn't the same as being found. But she's in it anyway, lungs full, waiting for angels that sound like warnings.