Scott Disick may be coming to regret his very public breakup with longtime girlfriend Kourtney Kardashian.

US Weekly reports the 32-year-old Disick recently captioned a place card at his friend's wedding that indicated he was a single guest, "When u realize the grass isn't always greener."

Disick and Kardashian, the parents of three young children, recently called it quits after he spent the July Fourth holiday weekend in Monaco cavorting with a rumored ex-girlfriend. For the 36-year-old Kardashian, that was the last straw in an endless stream of rumors about Disick's infidelity.

When he recently made his first public appearance since the breakup, Disick admitted he's taking life "a day at a time."

Meanwhile, Kardashian has been keeping herself busy by caring for their three children and spending time with her sisters. Sources indicate she is now contemplating seeking full custody of the kids, given Disick's often wild and crazy habits.

Through it all, Khloé Kardashian doesn't seem convinced parting is the best thing for the wayward couple.

"You can't deny how much he loves Kourtney," she told Complex magazine in its August/September cover story. "And I do think he tries."

There are also reports Kourtney may be having regrets about the split.

"She wants Scott back," a source told US Weekly. Other reports indicate that she hopes her threat to completely take the children away from him will slap Disick back into reality and prompt him to get clean and sober once and for all.

"If he gets to the point where he is really changing she'll let him come home," a source added. "Kourtney's shocked Scott isn't begging her to take him back."

Disick and Kardashian dated for more than nine years before pulling the plug.