[He's mentally tracking the timeline in his head, remembering back to the year before, to what was going on. Rachel dating Finn, Rachel not dating Finn, Santana and Brittany's sneak attack...

And then, there was a gap between then and when they had to have that horrible intervention about Rachel and dating the enemy. The confrontation where he and Mercedes had drawn the line. Them and the Glee Club, or Rachel's enemy boyfriend.

Needless to say, the memory sobers him up as much as it pisses him off.]

No wonder you were so smitten with him. First impressions are key and he had Lionel Richie in his back pocket. You never stood a chance.

[His voice is softer than it was just a second ago, however, and Kurt's pushing himself up to go and lean against her dresser as well, giving Rachel a serious but... almost... compassionate look.]

Look, Rachel, I wasn't there for either of these... emotional miracles of his, but... [He's making a face again. Because this is clearly hard for him to say...] If what you're saying is true, and if you want me to... try and trust you and him. I can... hold my tongue.

But if he so much as wants to flirt with you, so help me.... He'll have to work for my approval.

[Protective diva mode activate.]