Translation:Chcę być bliżej ciebie.
why isn't it "do ciebie"?
blisko is always without preposition and it takes Dopełniacz / Genitive
"bliżej do ciebie" inicates a direction: "closer towards you"
If bliżej was means "closer to you," then what would bliżej wam mean?
Nothing that would make sense, I'm afraid.