Vanessa Hudgens and Zac Efron, 20 share an easy and affectionate relationship

"When [Vanessa] sees Zac, she runs over and they kiss, oblivious to the dozen of us in the room. She rubs his stomach, he puts his arm around her – these gestures say more than any statement she could make," EW's reporter reports

Hudgens and Efron,are currently filming HSM 3 in Utah.

Vanessa Hudgens cautions teen girls who may be thinking of becoming more intimate with their boyfriends.

"You have to think it through, not just do something spur of the moment," she says. "So that after it happens you won't regret it. I think girls can be infatuated with their boyfriends and they have to remember [to put themselves] first."

Image WENN