How do i get my l one true love back?

I was with a girl named mariah lopez recently she ran away and we found her she ran with her new bf warren that has done this multi times i really miss her i know she still has feelings for me she shows them to a point. Im trying to hold back my love but i cant do it as well as i want to cause she just got back and i really missed her i just want to have advice on how to be and how i might be able to get her back? please help me out