Loquita is the affectionate, diminutive form of loca (crazy woman). In Spanish, adding the suffix -ita often softens a word, turning it into an endearing term like "my little crazy one" rather than a harsh label.
This word is the heart of the song, as Romeo Santos uses it to lovingly describe his partner's wild and unpredictable personality. He's not just saying she's crazy; he's saying he adores her unique brand of craziness, making this a perfect word to understand the song's passionate and playful theme.
This bachata is a wild love song for a partner who is anything but perfect. Romeo Santos kicks it off by declaring, "De todas las dementes en mi vida / Tú eres la loca que más he amado" (Of all the crazy women in my life / You are the crazy one I've loved the most). He's not just tolerating her flaws; he's completely in love with them, saying "Tus defectos se me hacen perfectos" (Your flaws seem perfect to me). He knows relationships aren't always easy, admitting that no one lives a story without problems.
He affectionately calls her his "tóxica maniática de tierno corazón" (toxic maniac with a tender heart) and lists all the things he loves about her: she's "peleona, posesiva y celosa, vanidosa" (argumentative, possessive and jealous, vain). He even throws in the very direct English line, "You're my crazy bitch." It's a celebration of a difficult, passionate love. The song ends with a great twist when a woman's voice says, "Mi amor, tú dices que yo soy loca / Pero más loco eres tú que estás conmigo" (My love, you say I'm crazy / But you're crazier for being with me).