Pegwad, just spend more time with him. It seems that your bird already feels safe around people. You just need to boost his confidence. What I did when I was taming my tiels was to put a sheet over my head and put the birds in my lap. They had no place to go bacause the sheet was over me and them and sealed from all sides, so they couldn't get away. I would talk to them gently and pet them in there for 1/2 hour every day. It really helped in making them my best friends! Try it!