"I wasn't, back home." Back home, where everything was crashing down around him, where he was not-so-slowly losing his mind from stress and whatever the hell was happening to his life. "I have more time here."

And there isn't as much to worry about. He's been able to relax, slowly and cautiously, as the reality of his new (temporary) life sinks in. Things might be occasionally stressful here, but not much more than a mission would be back home. Right now, he has more time than he knows what to do with.