Request near each other, you may or may not get them right next to each other but they should be pretty conveniently located...either in the same building or "next door" buildings.
But rooms actually physically "right next to each other" is pretty "iffy".
If you want rooms next to each other, have you considered getting a two bedroom villa? The second bedroom isn't as nice as the king bed in the first bedroom, but you would be guaranteed that the other party is right with you.