Edissy just felt more real to me -- more wholesome. He made her laugh, made her feel safe enough to open up to him and come home with him after only "meeting" him that day. He saw that she was struggling after just a few minutes with her, and cared about her, even though he didn't really know her.
Jason, on the other hand, was her boyfriend, and he didn't even realize she was struggling. Whether this is because he was not as observant as Eddie, or because Chrissy didn't feel safe enough to open up to him, or both, we'll never know. But the smile she gave him in the gym always looked a little strained to me, and I'm not convinced she was truly happy with him.