Kim Kardashian and Reggie Bush's relationship is confusing even to them apparently.

While there has been speculation that the Keeping Up with the Kardashians and Kourtney and Kim Take New York star and ex-boyfriend Bush are back together since the two were spotted having lunch together this past weekend, it's reportedly not the case.

"They don't know what will happen," a source told People. "They're taking it slow. They love each other so much and miss each other, but their relationship is so complicated."

Kardashian and the NFL player broke up in 2010 after dating on and off for several years.

Kardashian eventually moved on to Kris Humphries and the couple got engaged in May after six months of dating. They wed in late August, but Kardashian filed for divorce in late October after being married to the New Jersey Nets star for only 72 days. The couple is now in the process of finalizing their split.

"Things are up in the air. Kim very much wants to take her time and be single and heal from her divorce," the source added.