How do you get your ex-girlfriend back if she has issues and wants to leave to another city and believes in a long-distance relationship with you but you don't want her to leave?

Im not being funny but you sound like my sisters exboyfriend who goes out with another girl and says hes still in love with her well if that was me and i was like that i would probably tell her how i feel and if she wants to move away and you love her move with her with a few exeptions if your under 18 and if you dont have any money and its hard for you to find a job..... well ill talk again later thanks