Help!!! i want to get my ex back!!!?

hi, well my ex bf he brake up with me 2 go out with a nother girl she is my friend a little bit i have her as a friend in facebook and she what she is thinking and she put im not going to tell u the name she put example Carly is single maybe he brake up with her and i think i have a change to get him back he still looking at me when he gets his lunch on Thursday he talk to me! and i think he still have feeling for me i do! well on Wednesday he told me do u want to go out with this boy and i said no! i think he doesn't like me! then when i went outside he was like following me playing TAG with his friend and looking at me a bit!!! tell mem what u think if he likes me or not and something to get him back!!! NO BAD MAGES!!