He definitely looks like a English bulldog to me and a really cute one! Our Harley went through a "lanky" stage at around 6 mths. Now we have Raven who will be 5 mths in a few days and she is also looking a bit lanky. Some bulldogs look short and stocky from puppy to adult but lots of them develop differently. One of our son's males head and body did not fill out until he was almost three years old.
Harley - 4 years old .........Raven 4 mths
btw- Were you a ever a gymnast? I use to know a Joe Duda who was and was curious.