So I'm 20 and I bragged about something from high school. She said "that's literally such a cringey thing to say"

I said, suggestingly, "u wanna fight?" Acting offended as well

Then she said "if u have more bullshit things to Brag about then yes 😚"

At this point I thought she didn't believe me about my thing so I asked if that was the case or she just thought it was cringey and she said it's obviously cringey to brag about something from high school. This is where I fucked up hard. I said "eh I guess" and then "my post highschool life has been an epic fail so not much for brag about there.... Maybe my positive outlook" she hasn't said anything and it's been like an hour or two. Before this we exchanged around 100 messages in 30 mins. We were clicking really hard and she was really into me making flirty and suggestive comments. Is there any way I can save this? I understand that my mistake was getting too serious , I should have just flirted more instead of trying to brag and make a deal out of the highschool thing. This is a girl from tinder btw. My brag was that I was one of the smartest kids in my grad year because she asked about my major and I said aerospace engineering.