Till Forever Falls Apart Lyrics Meaning

FINNEAS and Ashe said that Till Forever Falls Apart is a love letter to friendship.
Its about having a friendship that is so good that even if you die tomorrow, your happy because you know you have that friend that you can always count on and that they could always count on you.
I don't know if it was intentional but they even related it to global warming and the environmental challenges we are facing and the potential actual end to our lives with the line "If the tide takes California".
I absolutely love that that they made a song that isn't about a romantic relationship and its based off of pure friendship and love :)