My 3 adult children all have learning issues, although different kinds...dyslexia, adhd., auditory processing problems, eye convergence issues, double vision, etc.
In this age of computers, poor hand writing isnt as big an issue as it was years ago. He definitely should be receiving some testing to see where his weaknesses are. The physical act of writing can be addressed with a computer keyboard...the thing that stands out the most to me, though, is that he left the 'r' out of birthday.
He is an amazing boy who is going to be an amazing adult ... he is way ahead of the game in relationships and expressing his feelings..both things that help to make a person a success at whatever their chosen field in life.
Since he does have many years of schooling left, I would definitely push for testing so that accommodations can be made for him in his classes. One accommodation my son had was to take his exams orally so there was no writing involved..Aced them every time!
Your boy is a special person who likely can think 'outside of the box' ... If you look at unusual thinkers who are successful, it's this quality that allows them to be successful.
*please excuse any errors as I have learning problems myself!