(There's to do this prolly a way to do this with scripting, but I don't know it.)
Sounds like you already have the links in place?
Okay, the first thing is, on your properties page, make sure you have "Advanced Variables" not just "basic." Then, up at the top in the line with Story Properties, click "Variables." that takes you to the page where you can create variables. Make one for tension, one for awareness.
Now, on your pages where you have links, over to the left there's some icons. The plus/minus icon, that's where you can set "when the player uses this link, add X amount to TENSION." The other icon you want to click is the red stop sign, that's variable restrictions. It'll bring up a page where you can set things like "this link only clickable if tension > 6". Also on that page, check the box that says "visible when inactive." That will make the link appear, but not be able to be clicked on.