Hi Denise,
It's disturbing how they grow up isn't it? I always recall that dogs are suppose to grow 7 years to our one (not sure if this is still the theory...), so yes, changes do happen quickly. Both my girls loved people and other dogs when they were young pups. Now, they are totally different!
Jessie loves people and will greet and cuddle anyone. However, is very fussy over other dogs. Some she takes a liking too and will play. Others she tells quite clearly that she is not interested. Mica, on the other hand is in love with any other dog. Yet, with humans she will say "hello" but is then quite happy do her own thing rather than hang around.
Jessie will cuddle up with OH for a good 3 hours on his lap at night. Mica will come say hello, but will always rather sleep at your feet than cuddle up. I guess they are all different, just like humans. We just have to luv 'em for what they are!