Privilegio translates to "privilege." It's a strong and somewhat formal word that elevates the sentiment of gratitude beyond simple luck.
In the song, the artist sings, "Qué privilegio poder tenerte" (What a privilege to have you). This word choice emphasizes the deep appreciation and honor he feels for having this person in his life, suggesting that their presence is a rare and special gift.
Ulices Chaidez's "Tenía Que Ser Así" is such a sweet song about finding the one you're meant to be with! It starts with the singer feeling incredibly lucky to have met this person, even shouting out how privileged he feels to have them and that they accepted his Instagram message, knowing he wanted to make them fall in love. He's amazed to find true love "En estos tiempos que ya nadie sabe amar" [In these times when no one knows how to love anymore].
What I love most is how he connects all his past feelings to this person. He realizes that the reason he never felt anything for anyone else, or why he always got nervous around them, was because "Tenía que ser así y no de otra forma" [It had to be this way and not another]. He even jokes about how their last names combine well, sealing the deal that they were destined for each other. It's a really charming way to say that some connections are just meant to be, from the very beginning until the end.