The things I have done to help him learn that I am a safe human, general:
* Treats. Lots of treats.
* Moving predictably.
* Telegraphing my movements very clearly when moving generally towards him. (Letting him learn the difference between me walking past him and toward him.)
* Giving him space and time to decide which way to go, when meeting in the hall. I would move to one side so he could scoot past me if that's what he decided.
* Slow blinks whenever I catch his eye.