Rob Gronkowski -- Dating Ex-Patriots Cheerleader

Sorry ladies, Rob Gronkowski is officially taken ... dating a super hot former New England Patriots cheerleader ... multiple sources close to Gronk confirm to TMZ Sports.

The object of Gronk's affection is Camille Kostek -- who was on the cheerleading squad in 2013 and 2014 ... before switching careers and becoming a TV reporter.

There have been multiple sightings of the couple out and about recently -- but now, our Gronk sources say it's official ... they're dating and they're not trying to hide anything.

Congrats!!