Hereâs what I think
1- find out if your crush likes girls. If you already did this, them skip to #2. If not, then countinue. A way you can see if their bi, gay, pan etc is by bringing up the lgbt community to them and seeing how they react, idk if this will worked for you, but itâs how I found out my old crush was gay.
2- ask if they like anyone. If they honestly like someone else, they will tell you. If they like you, or donât like anyone at all, theyâll prbly say something like âno, not reallyâ
3- when you go tell her that you like her, donât be like âhey whatitsfaces, I like youâ or something. You should say something along the lines of âIâm beginning to develop feelings for youâ because if she end up not liking you, itâs gonna make it easier for her to tell you if you say âdevelopâ instead of âhaveâ. It also might help save the friendship, since it seems like you arenât completely in love with her.
Bonus advice
See how she reacts in a group of people. If she tries to talk to you more, or glances or at you while talking to someone, she might like you