Girl...I didn't knew they had feelings for me okay? I didn't. She used to date this bunch of people which couldn't last till weeks or month's and i said why do you end up a very nice relationship and she said they're not like you and I just joked, and asked so are you searching for me in the people you have dated till now and she said Yes. So what am I supposed to do here!?
I just realized i misread "BI(bisexual)" as "BL(boys love)" which was why i was so confused
But anyways do what your heart tells you, if you feel the same way then you can tell her if you'd like, but then again you mentioned you're straight so that might be unlikely. Just politely tell her what YOU feel and prioritize that. It's better to reject her now than lead her on which could result to even more problems later. Goodluck OP

What happen if... Like yk, you're a straight person and have a BI bff who you support and is ready to fight everyone who said something bad about them... And yk one day, they suddenly drop a bomb after you ask them, So are you searching for me in those people who you dated and they say yes... So... What will you do in this Position?