My boyfriend never wants to set eyes on his mum

From a CFB reader

My boyfriend's parents separated 15 years ago and according to him, his mother left him and his brother with their father who along with his new wife maltreated them so much and that all through the years, his mother did not come looking for them. Now that he is all grown up, he says he will never forgive his mother and cannot spend his dime on her and does not want to even set eyes on her. I believe forgiveness is a virtue. Should I be scared and run away because I fear such a man who cannot forgive his own mother may never forgive me as well if I wrong him. Should I really be scared?