Could we BE any more excited? After multiple delays, David Schwimmer, Courteney Cox, Jennifer Aniston, Lisa Kudrow, Matthew Perry and Matt LeBlanc have finally filmed the highly anticipated Friends reunion special for HBO Max. “They all got really emotional when they saw the set,” says an insider. “Being there brought back so many fond memories.” It’s the first time in 17 years that fans will get to see the entire cast together since the hit series went off the air in 2004. “The jokes and conversation flowed naturally,” says the insider. “The special’s unscripted, so no one had to worry about messing up their lines.” Afterwards, “everyone went to Jen’s house for dinner,” the insider adds. “So much has happened since they filmed Friends, but no one has changed. They’re…