updated 02/14/2012 AT 11:00 AM ET
•originally published 02/14/2012 AT 3:00 PM ET
Is an old flame heating up Kim Kardashian’s Valentine’s Day this year?
Amid reports last weekend that the reality star reunited over lunch at the Beverly Hills Hotel with ex-boyfriend Reggie Bush, a source tells PEOPLE that the two are just friends – at least for now.
“They don’t know what will happen,” the source says. “They’re taking it slow. They love each other so much and miss each other, but their relationship is so complicated.”