Most Helpful Girl
The fact that he told you the truth on something that big shows that he does love you. I believe that he is genuinely sorry. If you love him, stay with him but do not let him go unpunished for what he did. Show him that this is his last chance and that it will take a LONG time until he can earn your trust. Don't yell at him and do not bicker at him, show that you are there for him and that you are genuinely disappointed. I do not think you should take a break, I think you guys should get away and go somewhere away from your home to sort things out. Embrace each other and make sure he buys you two dozen roses that fact that you gave him a 2nd chance. It is worth it. If he ever does it again or he shows one ounce of flirtation to his ex, leave him immediately and don't discuss anything with him.