6 years together is a long time, I doubt his answers to your questions is something you want to hear. It will be hard to move on, but it will get easier for you slowly and with time.
We don't like to acknowledge when we've been used especially by someone we loved, the pain of that knowledge can be unbearable. Though , there probably were some good times at some point in time, hold on to these memories of the birghter days, at least you had them, they will help you to let go.
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~