Be aware that as these small baby steps happen, your confidence will be highthened. The smallest glimers of hope can make us ecstatic. Then a set back and we are in the dumps. Prepare yourself for these setbacks and let the good things carry you through.
It is YOU, the things you are doing, saying, reacting to that have turned him around. Remember that. Keep doing what works and stop the things that aren't. Even during the setbacks remember what worked. Keep at it and stay patient.