Lucifer had been open and honest about his own uncertainty. He would at least become friends with the human. They had similar interests and got along well. Beyond that time and Balthazar were the determining factor.

The tease from Balthazar seems like a good sign and Lucifer expects it to be returned if Tony isn't too uncomfortable with the situation. He considers introducing Tony but for the moment let's it go so the two can work each other out.

He does reach out and put a hand on Tony's shoulder though it is more a pet over the shoulder blade than a pat to offer some greeting and comfort for the nerves. "At least you are drinking something that is not green finally."

The teasing that is going to go around this circle is probably going to be humorous enough to eventually break the ice to the introduction quickly.