GIGI READY TO BADGER BRADLEY WITH ULTIMATUM: PUT A RING ON IT!

IMPATIENT Gigi Hadid and her guy Bradley Cooper are still trundling along together almost two years after they first hooked up — but sources say the commitment-phobic actor has no intention of popping the question, and it's making Gigi wonder whether he's got one foot out the door.

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"She's dropped enough hints about rings and weddings at this point, but is finding it hard to read him," spills an insider. "She's tired of waiting and isn't afraid to stick her head out there with an ultimatum if it comes to it — and it just may.