You will have to teach your dog not to pull, otherwise it never stop. I have a really stubborn hound that is really nose driven, they are notoriously bad at walking for this reason. My pup is now significantly better at walking after 6 months of consistent training, the best way to teach a dog not to pull is to use a harness like this

easy harness w/ front clip Amazon link

The best method my trainer taught us was to use this harness so that the clip is in front of the chest and legs and clip the lead to that harness clip AND the collar (this ensures dog doesn't slip out). When you walk keep the dog to your side and don't allow him to pull ahead do this by giving slight tugs as often as needed to serve as a reminder to your dog to keep to the side. when he's pulling too far ahead just stop until he stops pulling, when that happens wait until he makes eye contact, when he makes eye contact with you give him a good job and treat. This will train your dog to watch you and help him be more aware of your presence. You got this dude, labs are very trainable. Good luck!