Hi NAP, I think he doesn't want gf involved because he would have to be honest about everything in order to fill it out right. You know, who he "really' is, she just knows what he wants her to about him. Can't have the fantasy person he makes himself out to be get messed up with who he truly is! She might not like who he really is!
By the way, here in Texas, being 2 hours away isn't a long distance relationship! Takes me over an hour just to get to work in the AM! If they really wanted to see each other more 2 hours isn't gonna keep anyone apart. Maybe things with gf aren't what he makes them out to be??