Ilusionarme comes from the verb ilusionar, which means "to make someone hopeful" or "to get someone's hopes up." It's a nuanced word that captures the feeling of being given false hope or being led on.
In the song, the singer laments, "Buscas pretextos para ilusionarme" (You look for excuses to make me hopeful). It perfectly conveys the pain of being repeatedly drawn back in by someone who ultimately leaves, highlighting the cycle of hope and disappointment in a toxic relationship.
The hook says the whole story: “Vienes y te vas” (You come and you go). Grupo Firme's singer opens already wrecked — “Hoy me parto en dos” (Today I break myself in two) — over a lover who keeps circling back with old promises (“¿Dónde quedaron aquellas promesas?” / Where were those promises?) and then leaving again before anything can heal. He knows the pattern and still falls for it: every time he gets close to letting go, she shows up with a new excuse (“Buscas pretextos para ilusionarme” / You look for excuses to give me hope), and he's back in it.
The live arrangement leans into that loop — the band holds “Vienes y te vas” over a long instrumental stretch each time it lands, as if the singer is still turning the phrase over before the crowd. By the last chorus he's stopped pretending it ends differently: “Es un infierno soportarlo, no puedo más” (It's hell to bear it, I can't take any more).