Bellaco is a Spanish slang term that can mean 'naughty', 'mischievous', or 'sly', often with a connotation of being a bit of a scoundrel or a player, especially in a romantic or sexual context.
In this song, the artist uses it to describe himself: "pero yo soy un bellaco y todavía te sigo" (but I'm a bellaco and I still follow you). It implies he's persistent and perhaps a bit cunning in his pursuit, even after being left behind. It's an interesting word because it's not commonly found in everyday Spanish lessons but is very present in urban music, offering a glimpse into more colloquial and regional expressions.
"De Lejitos" is Jay Wheeler working through the awkward stretch after a breakup, when two people are still tangled up in each other but keeping their distance.
He notices his ex holding him at arm's length. She's seeing someone else now, barely texts him, and doesn't reach out just to hang out the way she used to. He admits he still checks up on her online even after she stopped following him, and he can't quite shake the physical connection they had, especially one specific night around his birthday.
Underneath the jealousy and bravado, it's a song about unfinished business. He tells her to be straight with him about where things stand, all while admitting he's still more caught up in her than he wants to say out loud.