Tips on how to get a Taurus man to trust you

Hi I'm a Scorpio Woman dating this Taurus man... been together a little over a month now. He's been done horrible in the past by his ex-wife. She used him for his money and has taken advantage of him. He's moved on since then, but he’s had a hard time trusting people. He's finally started opening up to about his past and making me apart of his life now. He's very affectionate with me, and I’m very patient with him, but I also understand that he's going through alot and has trust issues. There are times when I notice him just staring at me as if he's figure me out and pick my brain apart, and there's times that he will start an argument with me over something that I have no control over. Don’t take that the wrong way- we never fight or get to the point where we are yelling at each other. I understand that this comes from his past and how people have treated him wrongly. Later after he's thought about what he's said to me and what he’s started a fight over; he always apologizes, and reminds me that his ex-wife used him and he just doesn't want to go through that again. I’m running out options personally… I really like this guy, and want nothing but the best for him, but if I can’t get him to trust me and stop bringing up the past I don’t know how long we’re going to last.

Any advice on how I could get him to trust me more...