I am so proud of you! You handled a difficult situation very well. I am glad that this part of the situation is over and done with for you. Now, you can straighten up your home and if you want to move things around, you have the space to do so.
As for his comments about the bike ride...take them w/a grain of salt for now. Please do not try to over analyze his every word because it will drive you nuts. As for him calling you after he left...hard to say what he wanted to tell you...but whatever it is, if it is important he will call you back.
Now...it's time to put that focus squarely on you and your son. Time to move forward and focus on today. Leave the future to reveal itself when it's ready.
Stay safe!
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.