I think it's pretty obvious that Cali said some things in the earliest stages of their relationship that upon further reflection she wished she didn't say. Some of those things were sexual, and some of those things implied that maybe there might be some future. However a few days into it, and apparently after seeing Casper on Skype she realized that she did not want to go down that path anymore but didn't know how to back away, especially since she enjoys her time on here. I'm positive it is these sexual things that she said to him in the earliest days that Capser is referring to when he says that he has 'his side'. But she can't be held accountable for what she said in the first days of meeting him, especially after quickly realizing she didn't want to go further. I believe Casper kept clinging onto whatever she said to him in these first few days and never was able to let them go. Which ultimately led to the vicious cycle that followed. I think now though, it's reached a point where Cali has said her piece and needs to move on (though hopefully stay amongst us) and Casper needs to stop saying he's moved on and actually do so.
Just my view from the end of the bench!