The fact that Bruce was still having nightmares and he hadn't really gone out of the way to be that social was proof that he wasn't a hundred percent either, then again for most of his life he'd been stuck in a state of vulnerability, what stemmed first from his deadbeat father turned into wanting to impress his then-girlfriend's father by turning himself into a lab experiment, which of course set off the chain of events which would lead to him becoming the Hulk. All those years of living discreetly so that the government and Ross's goons or worse wouldn't track him down made him stronger in some areas but weaker in others.
But having Thanos snap his life into pieces had broken him as well, in a sense that he was sure Tony could relate to. He had been one of the few that weren't taken, that weren't turned to dust but when he stood in the wreckage of what was once their team, when he walked back to civilisation and saw screaming infants without their mothers, when he tried to ring everyone on his phone and got nothing but either phones ringing out or bad news ('I'm sorry, Bruce. Betty's gone.') it broke him. He would have said yes to any question at that point, and he'd said yes to Preya.
While he looked considerably better than he had when he'd first gotten there, and he was sleeping during the night, nightmares aside, he still felt like he was pretty much operating on autopilot.
"Shut up," he said affectionately, "you know I have to eat extra because of my not so little problem," he helped take the things out and took out two tubs of Ben & Jerry's. "Wasn't sure if you'd be into it, but I saw some and I had to get it." He showed the ice cream to Tony, the flavours Stark Raving Hazelnuts and Hunka Hulka Burning Fudge. "I know you said you swore off dairy, but." He shrugged, also pushing some kung pao chicken Tony's way.
"Let's eat, and talk. Pretend I am that kind of doctor today." Bruce smiled.