He is done and has moved on from what you had. He is afraid that you have not let go and that makes him afraid to approach you.
Ironically if he thinks that you are also done and moving on from what you had, that actually makes you "safe" and approachable again, because you won't be approaching him with expectations, angst, and blame.
That is what GAL and act-as-if are all about from the WAS perspective, to make you safe and approachable because you have your own life, happiness, and self-esteem independent completely of the WAS.
Do not fear giving the impression that you have moved on emotionally and that includes having forgiven him for everything. That's different from dating someone new, someone new is not a requirement to show you've moved on.
Accuray
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015