My girl is now almost six and still hates her walks (that's wrong - she loves them: as long as they are very short and heading in the direction she wants to go in
). If her head goes down and she digs her claws into the ground I have no chance at getting her to go
I think it's quite common for young pups, and most outgrow it. Just let him take his time, and try and make his walks as fun as possible. Lots of treats and games. You may find walking with an older, more confident dog helps, if you know someone with one you can walk with.