Feeling a little used

I'm 20 and wondering if I'm even beautiful. I don't really get hit on much. Me and two friends and my brother were hanging out for New Years and drinking and partying. We went out and there was a guy who came up to us and I thought he was hitting on me. He invited me and my friends and brother on his yacht. I know that's not really safe but we were drunk and I was horny. We went on his yacht and he's talking to me and we are drinking and then he asks about my brother and this tattoo he has of a rainbow heart. He then goes to ask me my brother's sexuality and my brother is bisexual and eventually it becomes clear he was talking to me because he wanted to know about my brother because that's who he was after. He just invited us all. I was hurt and felt used. The night ended with me feeling ugly and drinking but having to pretend I'm still having fun and my brother making out with a guy. I'm just wondering what is wrong with me that guys don't like me. I even gave had guy friends and I know men and women can be friends but a lot of the time they do try to fuck you but that's never happened. Even a guy friend I liked said he only saw me as a friend. And now a cute guy who I think wants me and he wants my brother instead. Am I just destined to die alone.