Before you worry too much, ask him if he dislikes talking on the phone.
I know a few people who completely hate calling someone, especially of the other gender. But if he does hate the phone, he should've atleast told you.
Actually, I'm one of them. I'm way better off in person.

And it's not totally a bad thing that he follows the old "bros before hoes" thing. Eww, thats crude sounding. But you get the idea...
I know one guy who totally ignored all his friends after knowing a girl for 1 week. He asked her to marry him. And she was only 17. And this was a week after he raped her because she didn't want to have sex that night. But it was ok, he was drunk. Both nights.
On the bright side, his friends never had to deal with him again.

THE END