We drew a line long ago. We are willing to talk, but only after terrorism stops. Until terrorism stops, there is no scope for dialogue at all.
And no, you got something mixed up. We are vehemently opposed to third party interference. We have in fact made it clear to other countries that interference in bilateral issues by third countries will lead to a severe downgrade of diplomatic relations with that country. That's why no one has even bothered to interfere. It is Pakistan that tries to bring in a third party.