Relationships

Stringing Someone Along.
At what point is it no longer okay to act interested in a relationship when you no longer are? I have a friend who dated a guy for almost a year 2 years ago, he was a complete ass and broke her heart. She was stood up on Valentine's Day and he broke up with her just weeks before her family was going on a cruise, taking him with them. Just recently he realized he messed up and has been trying to get back together with her. She is really enjoying having the power in the relationship, making him pay for all meals, pick her up, buy her flowers, etc. She said she really has no interest in dating him especially not at this time, he hurt her too bad. She doesn't even act like she really wants to ever date him, just spends time with him, texts him, talks to him on the phone etc because she is bored or because he buys her food. She usually does not see him unless there is a meal involved. Is what she is doing any better than what he did to her 2 years ago?? How much longer is she allowed to do this to him before she has to move on? How long before he'll give up and move on?