How could I tell if she likes me?

well , we're close friends and I don't know if she likes me . well , I like her too tho . uhmm . okay , i've been seeing some changes . before , whenever we're together , we would really talk a lot and it doesn't seem awkward . well , she likes someone else . and i'm okay with it . cuz whutever makes her happy , i'll support her even tho it hurts me a lot . uhmm . we would always chat . like a lot. she would sometimes start the chat and sometimes , me . we would talk for hours and stuff like that . then one day , she asked me if I was BI . well , I didn't want to tell her cuz I was afraid and yeah . when she asked me that question , I just stood there speechless . after that , the following days , it seemed awkward . we didn't really chat a lot . and like whenever I start it , it seems like she doesn't have the mood to talk to me or something like that . I really don't know whut's happening . but like we would still be together . but there's also some things I see that would make me think that she likes me . cuz like we would always have eye contact . like sometimes , I would look at her and I would already see her looking back at me . smiling . but i'm really not sure if whut does it mean . she would also sit on my lap and stuff . and sometimes , she would lean back at me and yeah . my friend took some videos , (i don't know why) then she showed me . and when she was leaning back while sitting on my lap , she was smiling . so yeah . she would abuse me . well , she's just playing around . well , we fight a lot . not fight , fight . but friendly fight . and everytime she knows i'm mad , sad , and stuff like that , she would go to me and hug me to comfort me . but I really still don't know cuz she likes someone else . all I know is she thinks i'm straight but i'm BI. and one day , I was with the person who I used to like that she knows . and when I was with him , I saw her looking at me like she was jealous or something . not sure . then when he left , she went to me and asked me if whut was that for ? I asked her if whut does she mean ? then she said "you being with your ex-crush" and I was there like , "i don't like him anymore" but she didn't want to believe me . well , those are some signs . but i'm really not sure . I get confused too cuz when I see her tweets , it seems like she's talking about me . but i'm not sure tho . I really need to know . I do like her and I want to know .. so whut do you guys think ?

First.. I think she likes you like a lot.. And when she asked if u were bi ..maybe she was trying to tell you that she is bi .. And about that she likes someone else maybe its just a cover so u think shez straight cuz u made her think that u are straight..
So my advice to you.. Is you should tell her that u r Bi.. And wait a while to see how she responds then tell her u like her.. I know its not easy as it seems but .. U gotta do whatcha gotta do :)
Goodluck.. And tell me what happens with ya.. If u needed any other help :)