Idk what to do

So my ex boyfriend left me because he was scared that he would hurt me. He would snap easily. I'm not scared of him and I know how to calm him down. Sometimes there was nothing I could do and all I could do was look away. In the past year or two I have seen definite improvement. He hasn't snapped at any one and he has learned to control it. I love him to death and he is like my whole world. I want to back with him and I know he wants to get back in a relationship with me but I just don't know if I should or not. Please help I need some advice.