You're not.

[Eames' smile brightens a little, softening as he looks down and away from Arthur's face because he's about to say some sappy shit.]

Think about it this way. You've made me feel safe with you this long, I'm putting my life in your hands so I can spend a theoretical eternity with you.

[He glances up, a little hesitant.]

That's not undoing anything. It's cementing that all that effort was worth it.