Arrebatas comes from the verb arrebatar, which means to snatch, seize, or take away by force. It's a strong and dramatic verb that conveys a sense of sudden, aggressive loss.
In this song, the singer uses it to express his pain and anger as another person "snatches away" the love of his life. He sings, "Porque su amor me lo arrebatas" (Because you snatch her love from me), highlighting the feeling of being robbed of something precious and irreplaceable.
Neto Bernal's "Yo La Quería Para Mí" [I Wanted Her For Myself] is a really emotional song about a guy who's lost the love of his life to someone else. He looks back on a time when everything was perfect, saying "Antes de que tu llegaras, Todo era lindo, nuestra relación perfecta" [Before you arrived, Everything was beautiful, our relationship perfect]. He describes how he used to make her happy with "detalles, con palabras, con caricias y mi amor" [details, with words, with caresses and my love] whenever she was upset.
But then this other person came along with their "estúpida sonrisa" [stupid smile] and "mentiras" [lies], convincing her that the original singer "Para ella no era nada" [was nothing to her]. He's heartbroken, crying because his love was stolen from him. He confronts the new person, asking "Si a ti no te importaba, ¿para qué me la quitabas?" [If you didn't care, why did you take her from me?] and "¿Para qué la ilusionabas y dejabas que te amara?" [Why did you give her hope and let her love you?]. He's angry that this new person is lying to her, taking her to bed with "mentiras y palabras" [lies and words], and then will just leave her "como si nada" [as if nothing happened]. The most poignant part is when he says, "Y aquí estaré Cuando vuelva destrozada" [And I'll be here When she comes back broken]. It's a powerful and sad story of lost love and betrayal.