Ennis had an honest, unspoiled ,and gentle response to her agressiveness. ( a footrub?) Any other man would be flatterd to have this beauty approach them in this way. She had to coax him to stay , coax him to the dancefloor, and later found that Ennis did'nt talk much. But she could work with this. Cassie was the one , as with Jack who had to coax Ennis out of his shell.
During this courtship I think Ennis let Cassie lead. She fell in love with him eventually. "Girls don't fall in love with fun" is in response to Ennis saying " I probably was'nt no fun anyway" Ennis himself really was'nt having much fun with her .
She was not his kind of fun, Jack was. Like Jack, she had gotten past the fun stage. She was seriously in love with him and was looking at long-term possiblities with him., But Ennis never had any intentions of getting any closer to her than he already had. Been there, done that, and did'nt want it again. How could he ever explain to Cassie that he wanted a man instead of her. This relationship was doomed from the start,imo just like his other experience with a woman after meeting Jack,...Alma. He gave up a marriage and a potential marriage to these women, but continued to see Jack. That's very telling. MO