[ Yet to Viktor, there isn't anyone that could compare in any way, shape or form to Yuuri. His soul is so tightly attached to Yuuri that he'd be missing a large part of himself if he were to ever lose Yuuri.

Sure, he has Yuuri complacent in living a life here together, but it's obvious from this talk that he still believes that there's a chance things might dissolve back home.
At this point, Viktor can't help but give a small, helpless laugh. It's not directed at Yuuri in the slightest, but this situation seems so ridiculous to him. ]

But I can. It might be different back home, but I will still make sure my feelings are made clear. I have complete faith in myself that I won't let you get away from me, even if you feel our time is numbered. Sharing my emotions with you here was a convenient tool, but it doesn't lessen how determined my feelings are about you at home, either.

[ As for the frustration part... ] I'd be lying if I said I had no frustrations over the situation, but I don't want my time with you spent holding tight to those. I want to cherish every moment I have with you.