You may never get resolution/closure from him or what he did. Continue moving forward and hopefully, one day, he'll get himself together. But, if he doesn't, you will have moved on and created a new and happy life for yourself and your daughter.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
