what would you do about the guy that you can get over a xboyfriend

there a girl who date a guy when she was a ten grader and when they broken up and from there they when down heel from there because that when they start be on and off for two years from there and when we last broken up she move and when she told him he hate her so they have talk for the past three years and when he start where he wanted know how she been doing since the past six months when he wanted to know how she was but never had the had the power to send one message to her until one day she was on face book after three years and now that he did that then it only take three mints to get him to fall right back in love with him but he had did the same to her she in to another guy's that go to her new school and she just don't know what to do about the place she was put in over a guy that she can think of what to do