Sorry this is long guys!! I need advice so please read!!

I have this one girl who has been my best friend for like 5 years now. She openly shared to me that she is bisexual a couple of years ago. I told her I might be questioning my sexuality but I’m not completely sure.

Anyways I noticed that I’ve had a slight crush on her. I figure that’s normal because she very pretty and fun so I push those thoughts so the side and carry on.

Recently she’s been hugging up on me and sending flirty emojis and she won’t tell me who she has a crush on. We share everything so this is big.

What do I do? Do I confess my love and potentially ruin things? Do I wait for her to make the first move? Do I flirt back? Please help guys sos