yes they are...i heard from the internet that Zac already propose to Vanessa on their vacation to Japan. That's was because Vanessa mom doesn't allow the two of them to stay together at one house. So, Zac propose to Vanessa to make her mom happy and allow the two of them to stay together. And they are really in love....
i found this at the internet;
[Zac Efron Reportedly Proposed To Vanessa Hudgens To Please Her Mother February 26, 2009 - Zac Efron and Vanessa Hudgens
Zac Efron has proposed to Vanessa Hudgens to please her mother. The "High School Musical" actor reportedly popped the swali to his girlfriend of three years because her mom Gina Hudgens doesn't approve of the couple living together out of wedlock.
A chanzo said: "Zac is relieved to be out of the pressure cooker, because Vanessa's mother has been putting serious heat on him to make an honest woman out of her daughter. She is old-school and doesn't approve of Vanessa living with Zac without some type of wedding promise."
Zac, 21, is believed to have asked 20-year-old Vanessa to marry him while they holidayed in Japan in January.
The couple spend most of their time living in Vanessa's six-bedroom Tuscan style mansion in Studio City, California - despite Zac spending $2.3 million on his own modern, two-bedroom house in the Hollywood Hills last December.
The chanzo added to National Enquirer magazine: "Zac loves the current arrangement. He adores Vanessa and they gel really well together. Gina already considers Zac a part of the family. So she's happy that he proposed."
It has been reported the couple - who met on the set of "High School Musical" - hope to tie the knot sometime inayofuata year.]
ther not married zac sad it him self that's just a rumer!! he sad he does'nt whant to get married until he's 40 au anleast 30 years old and vanessa agrees with him...BUT HE DID PROMESS HER THAT THEY R GANNA GET MARRIED EVENCHOUALY!!!!!!!! and yes they are still dating DUH!!!!!!!!!!!!!!!!!!