No, as Nick said, that will happen every time, and they are always your enemy.
Also, I know what your problem is, persuasion options are unlocked depending on how much paragon/renegade you got. If the "We should work together" one which I highly believe is the top left one, is grayed out, then you do not have enough paragon to use it, but if the bottom left which is your renegade option is actually red, then you have enough renegade to use it. I also assume you built an evil, bad character, aka renegade. If you do the good options during your next character, you will most likely have it unlocked on your next playthrough.
If you don't know, top right = Paragon, middle right = Neutral and bottom right = Renegade options in chat, always.