What do I do?? help me please?

Sry so long!!!I need help im in love with my best friends brother and im in love with her im so confused it all startd when I was dating her brother and she started actn different around me it was strange but let it go! He goes to jail! Then he makes me mad cause he talking about his homegirl comes to visit and a whole lotta stuff making me feel bad but im busy I work everyday and go to school its hard! He not understandn I was done! So I started gettn feelings for my bff and she started gettn feelings for me! We startd dating! Time goes by! Lately weve been fightn and I was wondering if she wanted to be with me and she said I ask that to much so she was fed up! She told me this is pushing you away do you! So thats imma do! Time goes by she asked me if I have feelings for her bro first why does it matter 2 her? Her and I are ova thats what im thinkn so I have feelings for both (more her) id want to hurt her) shes jealous of me liking her bro I think!! And its hard! She thinks I’ve been lying that I had feelns for him the whole time but if she read the letters she would know him and I were over! I’ve tryd to get back with her believe me she doesnt want to she even told me we not bffs we friends! So im trynna move on so now she mad that I mite get bac wit her bro! I just don’t know what 2 do! I want her back really do but no matta what I say or do will work so why try! You think she still have feelns even if she say she doesnt??