This girl, lets call her HB10 and I had a thing, we had never kissed or anything but we had a bit of a thing over text. We would flirt and generally had a good vibe about her, I was almost in love (maybe because she is so hot.) I would invite her to do stuff but more often than not stuff would come up, she would have volleyball practice, family would come in or she just plain declined which was the case last night.
I don't know if she actually liked me, one of her friends a few weeks ago said I better not hurt her, so that made me think she actually does. So last night I invited her to a party that I was going to but HB10 replied with "thanks but no thanks

" and then I said "I'll party hard for her

" and then she replied with "don't get too wasted

"
So fast forward to the party and at the end of the night I end up making out with an HB 7, and progressed to a SNL on her, barely said any words but ended taking her back to my house for a good night of fun.
So the HB10 and I have hung out once on a group lunch date and that has been it but we have texted a bit all flirtaciously. These girls are in high school and I graduated this past year that's how i know of them.
So the problem I forsee is that the HB10 will want nothing to do with me after I had sex with the HB 7, is there any possible way to recover from this? The HB10 and I have never kissed or done anything, so will this move me directly into the friend zone once she finds out? I was blackout drunk and really wish I hadn't done this. I think I was starting to develop feelings for the HB10, over text that might just be a sign of oneitus, but my feelings are even crazier for the HB10 now that I realize I might lose her.
What would you do?