You don't know...he may have already lashed out at his co-workers. As for his new found friends, I don't see it happening. He wants to project a new and improved him w/them.
He's a totally different person w/his new friends...it's simply amazing at how they can turn it on and off. He will slip up and lash out at work.....at some point, they can't hold it back, especially if he doesn't have you as his punching bag.
"Snodderly"
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.