Advice? I guess?

I'm a Senior this year, and I was thinking about asking a girl I know to Homecoming-but I'm not sure she's gay. She's made jokes hinting to her being Bi in the past, and

until this I wasn't really thinking too hard about it. (She's always been really nice and funny, but thinking she was straight turned me off to the idea). I guess I'm just looking for general thoughts and advice? im a generally confident person,I but I've never been really good at asking people to anything, so I'm open to anything 😅