I think your doing well. Listen to him, don't offer advice unless he asks for it. Continue to validate what he says he feels. It's very difficult to do after going through all of this, but you can do it.
Things may get a tad bit more strange for a little while. He may begin to suffer some withdraw or go through a grieving process now that ow broke up with him.
Continue to be his friend and listen. Keep an even keel with no expectations and most importantly be patient.
