Definitely more B than A but you never know because Jack loves to Joke, but he strikes me as a "OTP" kind of guy (except he can't die anymore so he dogpiles his One True love ones in a corner of his mind labelled precious memories)

but NO, there WERE feelings there
Exactly, and I'm sure Jack and Ianto did work out that point later on. No way they didn't, Which In mind lead to a reset of whatever they had and Adrift's episode where it looks like they're in the middle of the first hot phase of a happy something when they actually start doing each other 2 years ago.

But Jack during the Cyberwoman's events seems so angry, so hurt, he probably thought that Ianto didn't love him at all.

BBC,
More stuff on-screen please...