We've all been through things like this and it hurts. I'm sorry it happened to you but whatever you do, don't hang onto it. Forgive the person and get on with your life. Hurts are heavy and the weight of carrying them around will eventually drag you down especially if you're carrying multiples. Let it go! If the other person won't allow the rip in the relationship to be mended, then walk away and forget about it knowing that you've done what you could to fix it.