Cute! Cute! Cute! I love in that first picture how his nose coloring is sort of shaped like a heart
Has anyone talked to you about the dangers of dog parks and the possibility for your boy to become unfriendly with other dogs? Here's the (probably most commonly linked) thread about dog parks from this forum: viewtopic.php?f=2&t=50274
Pretty much the first post of the thread covers all of the important things. If you okay with having him there, just know that eventually he might stop tolerating the other dogs. It is very common (and there's nothing wrong with your boy if it happens) for PB type dogs, as they mature, to become less and less tolerant of other dogs-even dogs they've know their whole lives, even dogs that seem like they're BFFs. It doesn't happen to all of them, and it isn't anything you have or haven't done as an owner. It's just...what were these guys bred for? For how many years were they bred that way? While the dog you have probably wasn't specifically bred for that, and very likely neither were his parents-it's still genetically there. Like a Collie herding or a Golden retrieving.
Hopefully if you weren't already aware of these things, they don't scare you, and instead encourage you to do some heavy duty research.
Hope you enjoy it here!