15 Years Old, just had sex, need help!!!?

Okay well me and my ex (chloe) went out who weeks ago, it didn't last long and we broke up. But a week later she asked me to stay at hers, I did we got drunk and had sex. The next day she was saying sorry, she said she didn't regret it but felt confused as we were best friends. So we decided to just be mates, I was obviously hoping we could be more than mates but it seems it didn't mean much to her, she then asked if I still loved her, I said yes which I do but she said she no linfer likes me because we are to close (friendly way), do you think I have a chance of ever getting back with her because I really can't get over her, and she didn't just have sex with me because we were drunk, as we had sex later the next day (sober). Don't judge me because of my age.. Thanks!