I think you're right about the no marriage thing. I think, maybe they're going the Sara/Grissom route. I mentioned it, in the spoiler thread i think. That if it is Stella they're probably gonna have Mac say something about them working together and how it's not gonna work out between them. But I have to keep my hopes up, otherwise I will go to boredom hell during my studies...
Hey Engle!

if any of them have to say something i truly hope is Stella. She has waited more than enough time for him

Anyway i think they could create "tension" between Mac and Stella leaving people seating "on the edge" but always having them working together as usual but also having both of them struggling against their own emotions
That would be sooooooo cooolllll Of course, it would be nice if we had at least one kiss in Season 7

they could be tormented by the memory of that kiss. Because if they kiss and then nothing happens to them, what's the purpose of the kiss?

If there is a kiss, a change must be shown in them!!!!