Vergeige is a fantastic, informal German verb that means "to mess up" or "to botch" something completely. It's much more expressive than a simple "einen Fehler machen" (to make a mistake).
In the song, LEA sings "Und ich alles vergeige" (And I mess everything up), capturing a moment of vulnerability and failure. This is the kind of colloquial word that will make you sound more like a native speaker, perfect for expressing those times when everything seems to go wrong.
Have you ever thought about that one person you can go to for absolutely everything? This song is a beautiful exploration of that idea. LEA imagines every possible scenario, from the best to the absolute worst, and for each one, she knows exactly where she would go.
She lists these moments one by one. She'd go to this person when she's happy and wants to celebrate, but also when "Träume platzen, die Erde bebt" (dreams burst, the earth quakes). She'd go to them when she has nothing, not even a cent, and also when she feels ashamed of her mistakes. The core of the song is the vulnerable question she keeps asking: "Sag, darf ich zu dir?" (Say, can I come to you?). It's a sweet and powerful song about finding a safe harbor in another person, no matter what life throws at you.