Yes, it hurts.
Don't let it take up too much space inside your head.Your best option right now is to let it go. Resentment is the number one stumbling block for addicts.
You are having what I refer to as the "baseball bat effect". Every fibre of your being is screaming out to grab the baseball bat and start swinging, but we all know the consequences we will have to pay for that option.......your only true option it to let it go.....he is not worth losing peace, sleep and perhaps your sobriety over.....