Do you know why this happened ? because you have not loved him truly. If you have loved him truly then you won't even think about breaking your loved one's leg. You have a great life ahead and doing bad to someone will not make you happy. I know the feelings and i have been through that situation. The pain is very deep and its hard to forget but still life can go on. If you ruin his life, it will ruin his family life. Just think same about yourself. What will happen if anything same happen to your family? 

So my suggestion to you is don't spill your anger making some wrong decision. Try to make your life happy. You will always find a better partner. I know when love hurts it hurts so deep. Try to help poor with that $10000 rather than ruining one's life. 

Be Good