I got super jealous over my crush's friend and now I think I messed up any shot I had with her. How do I fix this?

There is this girl that I have a really big crush on and she has expressed intrest in me. We have been talking for a couple months now, but neither of us on in a position to be anything more than good friends. She knows that I like her a lot and I know she knows, but we have both just let it be an unsend thing and continued to be friends for the sake of our friend group. Everything was going good until one day me, her, and her friend were walking and we were talking about a TV Show that Me and the Girl I like both really like and have watched together. Her friend made a comment about how she told the girl about the show first and how the girl didn't really watch it until she started watching it with a guy. Right before she could say the guys name the girl smacked her friend immediatly because she knew how that would affect me and the next couple minutes after that were really awakward. The rest of that day I started becoming really distant and wouldn't even look at her because all I could think about was her realtionship with this guy and why she didn't want me to hear about it. I started jumping to the worst possible conclusions. She could tell I was visiably upset and tried to cheer me up , but I just kept ignoring her. We aren't even in a relationship and I was acting like a jealous boyfriend. The rest of that night was weird and I told myself to act normal the next day. The next day our friend group was hanging out and when I saw her I went back into that depressed mode and was ignoring her. She tried to talk to me and after realising that I was still mad and making a scene over noting, that's when she became mad. She started ignoring me and by the time I realised I was being a dumbass that damage was already done. She wouldn't talk to me the rest of that day and now I fear that I just fucked any shot I had with her. I dont know what to do or say to her to fix this. Any advice?

I got super jealous over my crush's friend and now I think I messed up any shot I had with her. How do I fix this?
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