Source: Kim Kardashian and Her Cowboy Are "Cooling Off"

E! star will not be watching Dallas Cowboys' season opener from the sidelines, says an insider

Dallas Cowboys fans got quite the treat last weekend when Kim Kardashian showed up at training camp in San Antonio. But if they're looking for the E! star to become a fixture on the sidelines this season, they might be disappointed.

A source in Texas exclusively tells E! News that Kim and Cowboys wide receiver Miles Austin have been "having fun this summer" but, contrary to how it might look when they're about and about, "things are not super serious."

Maybe Tony Romo told his teammate to leave well enough alone, at least until they make the playoffs. Or maybe Kim has just seen enough football for awhile.

Either way, she has no plans to attend the team's season opener in Dallas next month, our source says, saying, "They're taking things slowly" and "are cooling off a little."

Besides, the insider adds, "Kim wants to be single and date around."

While those who are still scarred by the Jessica Simpson days are probably happy to hear this, there's one pretty important guy who may be disappointed.

None other than Cowboys owner Jerry Jones called Kim a "good luck charm" after meeting her in San Antonio, a local tells E! News. And maybe Romo isn't one for curses anyway. He and girlfriend Candice Crawford (Chace's sister) joined Kim and Miles for dinner that night.

Fast-forward to now: Kim, back in L.A. after her Texas trip, hit the town Tuesday night with sister Khloé, Lamar Odom and pal LaLa Vazquez.