02/16/2012 at 05:00 PM EST
Talk about a memorable Valentine's Day! Former Hills
star Frankie Delgado popped the question to his lady love on the year's most romantic day.
"I can confirm that on Valentine's Day that Frankie Delgado got engaged to long time girlfriend Jennifer Acosta while vacationing in Cabo, Mexico," his rep Eric Podwall tells PEOPLE exclusively.
The following night Delgado was back in Los Angeles celebrating at Beacher's Madhouse
at The Hollywood Roosevelt Hotel with close pals Brody Jenner and Evan Ross.
"He seemed really happy and was very appreciative when Evan Ross congratulated him," says an onlooker. "He was all smiles when the emcee announced that the bottle via flying [little person] was compliments of Evan Ross on his new engagement and the crowd cheered for him."