[17/m] Good friend that is a girl wanted to do stuff a couple months ago but I don't know what to do

OK here it goes... I have a good friend who is girl and I always assumed she had no sort of attraction towards me, I've always been super into her but I've kinda just learned to suppress those feelings because I thought she didn't like me like that and blah blah blah. Well like two weeks ago a girl who used to kinda be friends with her said something along the lines of "Why havent you fucked her yet" or something like that and then showed me texts from late November when they were talking about my freind hanging out with me after I had made her pretty mad because Im a dumb ass and said something like "I dont want people to think we're dating" because I didn't want her ex-boy friend who she's still friends with and is my good friend and who is doing an foreign exchange thing to find out and I made it seem like I didn't want to be associated with her. I thought I made it clear that wasnt what I meant but the texts whent something like this

other girl: "Hey how'd it go with crimedog"

friend: "Honestly a little heart broken, he made it seem like he didn't want people to think we were together" "I was gonna suck his dick but whatever"

so now I know she had at least some level of feelings and now I dont know what to do. Does she still have feelings? How do I tell her that I want this more than anything? Do I tell her that?

Any help would be appreciated, thank you