Alright, so this poem also seems to be about her mother...? At least thats how I am interpreting now after her Mother's Day post and considering the content of LA Who Am I To Love You:
"Secrets about [...] mother"
So Lana is alluding to something noone knows about her mum
Then, "all of the people you meet on the street will reiterate lies that she uttered", meaning her mum might have told others something Lana considers untrue.
Lana is experiencing nightmares, waking up "late at night", with "tiny beads of sweat dot[ting her] forehead", after dreaming of escaping to the island of Catalina
"But alas, this is a real life - and it's been a real fight just to keep my mind from committing treason"
You can only commit treason to someone who trusts you, so it must be someone close to Lana - and again, it is a woman, because in the next paragraph, she says "She told the townspeople i was crazy"
Lana grew up in the small town of Lake Placid, and I interpret this as Patty telling everyone lies to hide Lana's alcoholism which lead to her going to boarding school?
Now, the "treason" might be to just spill everything about their relationship. Lana has said in the past she can't talk about some stuff as long as some people are still alive.
"i've gone scorched earth" aka Lana's life has been hell
"Would standing in front of Mt Rushmore feel like the great American homecoming I've never had?"
Could this mean Lana's mum has never been proud of her, or her achievements?
And then, "Would the magnitude [...] take the place of the warm embrace I've never known?"
So it seems Lana is not coming from a very loving family.
The poem then ends with Lana preparing dinner, giving us insight in what's going through her head when she is alone.