It's perfectly normal to feel this anger towards him , he left you when you needed support the most. Do you have a Therapist ? If no you should, they can help you walk thru the grieving process, you are grieving the loss of a marriage, and wondering how to get on with your life and kudos to you for getting into college , that is a wonderful accomplishment, be proud.

You will come to a point that your no longer angry at him and the focus will just be on taking care of the children and tending to there needs.

Right now just focus on getting into a good stable place an move on with your life and find happiness.

Welcome to PC