I feel like a shitty friend but we have a connection

I (25M) have a crush on my best friends ex from 5 years ago. She’s always known I’ve had a crush on her and we’ve always gotten along very well and have had deep convos and been there for each other. We fell off due my last relationship and my girlfriend at the time making me delete her. Recently she popped back in the friend group and asked about me. Me and her reconnected and I asked her what’s going on with her and my buddy and she wants nothing to do with him just happened to run into each other. I confessed my feelings to her and asked her on a date and she responded idk let me think about it. I feel all over the place and am probably more than likely a crappy friend but me and her have always been close and have genuine feelings for her any advice would help.