Ladies... Did I just mess up everything or do I still have a choice?!

So, I'm 17. The boy who likes me (Jisung) and I kinda like back is 16, and his brother (Ji Lee) is 18. They're asian and I'm white and so I can't really go to my mom about my "girl problems" Because she disapproves of dating poc. Jisung is a grade below me- he's a junior. His brother and I are both seniors. Ji Lee is I guess a manwhore? All the girls in our grade have probably seen his dick, but he rarely ever actually shows romantic interest in a girl. We would spend hours talking on the phone, go out occasionally, and he brought me flowers once. I had already knew Ji Lee a bit longer than I knew his brother, but when Jisung and I started talking he felt more genuine. I found out Ji made a sex tape with an older college girl while we were "going out" and Jisung consoled me. He made me promise that I wouldn't go back to his brother because he's misogynistic and only cares about sex. So I did promise him. Him and I became flirtatious and just really close friends. We didn't have sex but one night he ate me out and I was just loving every minute. He didn't ask me to be his girlfriend yet because I assumed he was nervous so I guess I was still open to other guys. Ji Lee apologized to me for everything and asked me to come see him last week. I went over and he started crying on my shoulder. After I consoled him and forgave him he started kissing me then took me to Jisungs room to have sex. Jisung walked in on us and asked us to take it somewhere else. He looked extremely disappointed in me and his brother was smirking at him. After that night Jisung has been really dry with me and shady. I asked him if we are still good friends and he said yes... But it feels like he just hates me now!