I really like her. Wat should do?

I like my bestfriend jennifer & idk if she likes me the same way. Ive told her how i feel bout her & wat i like bout her & she told me that im gona find someone 10 times better :/. Then she txted me like 5 hrs l8r & said that she doesnt know wat 2 tell me but she wants 2 feel the sameway but i cant & idk why. Also, she been flirtin with this girl she met last summer named jackie. When they first met they liked each othr & kissed but jackie end up askin her ex cesar out & jen said she was done with her, but i guess not. But jen did tell my buddy natasha that shes usin jackie 2 get ovr this girl she was inlove with & she also told her that she doesnt wana use me or feel like shes usin me 2 get ovr the girl she liked so that means she cares bout me more than jackie. My buddys jill, natasha & karina said i shud let her come 2 me & she has. Wen she sees me she hugs me & we mess around & she poked me on fb yesterday & txted me. So shud i flirt with her & have her come 2 me more? How can i flirt with her? Help me.