How can i get my cockatiel to trust me?

I just got him about 5 days ago, from a differen't home who's had him about 4 months. He's a male, and he's still scared of my boyfriend and i (primary caretakers) and we let him come out of his cage willingly. He wasn't handled a lot in his last home and he's just not used to it. How can i get him used to being handled and not so afraid of us. I have a lot more questions and i would like to talk to someone who knows a lot about this subject