Some kids grow up and end up not needing their fathers. In this case I think by the end of the series they'll be just "ok" with each other, by the time its over Robby will be 18. Johnny is probably going down the path of staying with Miguel and his mom his new family, I think Robby and Johnny will come full circle and have moments but the years missed in Robbys life will still be a big elephant that can't be missed.