I think he feels as guilty as you. Maybe even a little ashamed of not being able to control himself. A lot of men tend to walk away from conversations that make them feel uncomfortable they deal with things differently ...they hope problems will just go away. Give him space ....with time it wont seem so bad and you will both just accept it was a mistake, but you both learnt a lot from it. Telling your parents? ..... I wouldnt some things in life we just need to figure out for ourselves thats part of growing up and becoming responsible adults.