does she like me back??

I've had the biggest crush on this girl ever since I met her (we'll call her jam), and I'm trying to decide whether its a good idea to confess to her at homecoming. First of all I LOVE to talk to her and we've talked everyday, and sometimes she even texts me first. (not usually though). She makes it very clear that she's also gay (as have I) so I'm not worried about her sexuality at all. I asked my friend who is jam's best friend, and she said that jam never texts first ever so the fact that she's texting me is a good thing. Everyday at lunch we go to the library together and talk, just the two of us, and honestly it's the highlight of my day. She also liked my insta story where I reposed a post that was two text messages: "How was i supposed to know you had feelings for me" "I literally like your stories" I also noticed that she initially viewed the story 20 minutes before she liked it, so maybe she was contemplating whether she should have liked it or not?? I asked her to homecoming yesterday and she said yes, but I can't tell if it's a platonic yes or a romantic yes so I don't know if I can risk confessing, I don't want to ruin things. This is my first time talking to someone who might like me back, let alone another girl, and I have no idea how any of this works or what any of this means. If anyone has any advice or anything at all it would mean so much to me, I really don't want to mess this up.