I do think this question might be better suited for the relationship boards, but I must tell you how glad I am to have stumbled across your inquiry.
Obviously it's impossible to declare what kind of a person this man is from the limited information we've been given. That said, the part of your description that is shooting off the screen for me is about him stuttering.
One of my very close relatives is actually one of the country's foremost experts in the field of stuttering. Through her, I have learned so much about the pain, shyness, embarrassment and difficulties that stutterers face, both within themselves and out in the world.
To you and me, stuttering might seem like no big deal. To severe stutterers, however, fears related to their stuttering can consume their lives. You wouldn't believe the stories of pain and avoidance I've heard because of it.
If this man's stuttering is anywhere from moderate to severe, I would have little doubt that the reason he used a method of non-verbal communication to meet you was because it meant that he wouldn't have to speak from the start... or risk rejection because of his stuttering.
If he has been avoiding any major elements of his life because of his stuttering, which could easily involve romantic relationships, I wouldn't be surprised if he were shy, reserved or insecure with you. Also, I wouldn't be surprised if he felt himself in a catch 22 situation -- stuttering worsens with stress, and stress worsens with stuttering.
There are qualified speech pathologists out there who specialize in stuttering and are truly capable of ameliorating even the most difficult cases. The problem is, however, that there are also a lot of speech therapists who really don't know what they're doing when it comes to stuttering.
If you think that this man's shyness could be related to his stuttering more than anything else, and if you have fallen for the charm and goodness that kept you curious enough to chat with him for 5 months, then you will need to decide if his merits outweigh his shyness and his hesitations. We definitely can't make that call for you. If you are still interested in him, let's just hope that he opens up as soon as he realizes that his stuttering alone won't be the thing that drives you away.
By the way, you might benefit from learning more about stuttering in general. I think that few people realize how significant it can be for people who suffer from it.
Stuttering - Wikipedia, the free encyclopedia
List of stutterers - Wikipedia, the free encyclopedia
It sounds like you really do like him. Arrange a second date. Tell him he doesn't have to be so shy, and keep it light. See how the second date goes. Good luck!