The vampire thing draws his attention from all that though. It's... tricky, as far as he's concerned and he's already made some promises he's not too hot on. Maybe talking it through with Jack will make it seem easier. Maybe not.
"I don't blame him. It's not like we're getting any older." While Ianto would age and grow weak and sickly. That's the downside with mortals and with the three of them stuck here indefinitely, turning him would be the least heartbreaking solution as far as Spike's concerned.
"Said I'd do it if he's serious, but it's tricky and he knows it. Not something we should even think of attempting anytime soon, if at all."