Extrovertido is a perfect cognate, meaning it looks and sounds very similar to its English counterpart: 'extrovert'. It's an easy and useful word for English speakers to add to their vocabulary!
In the song, the singer playfully describes himself as "un loco extrovertido" (a crazy extrovert) to whom his love interest has given meaning. Using a personality trait like this, instead of more traditional romantic language, makes the song feel modern, personal, and endearing.
This song is a super direct and charming love confession, maybe with a little help from some liquid courage! The singer tells a woman that he can't get her out of his mind, saying, "Gracias por darle sentido / A este loco extrovertido" (Thank you for giving meaning / To this extroverted crazy person). She brings him joy and he feels like he's been waiting for her his whole life.
He really gets to the point in the chorus, admitting, "Me da vueltas la cabeza / Tomé bastante cerveza / Estoy muy enamorado" (My head is spinning / I drank a lot of beer / I'm very in love). It's this mix of beer and love that gives him the confidence to ask her to be his "princesa" (princess). He even uses funny lines like, "Ya estoy formado en la fila / Para meterme en tu vida" (I'm already lined up / To get into your life), as if he's just waiting for his turn to be with her. It's a sweet, slightly tipsy, and totally honest declaration of love.