Prom

I went to my prom my senior year of high school, and I had taken my girlfriend. It was not the greatest night of our lives, mostly because of the fact that she looked bored, we didn't dance, and we didn't talk much throughout. We didn't dance because neither of us liked the music they were playing, it was all ****** hip-hop, rap, or reggaeton. I'm not a teen who likes to dance to that kind of music, especially because of the inappropriateness of it. I just can't stand it. Anyway, this year, my girlfriend is going to prom with her friends, and I really don't know how I feel about that. I mean, I'm glad that shes going with her friends, cause obviously her friends didn't go last year, but I'm also sad, because she didn't enjoy my prom, and she knew EVERYONE at the table we were seated at, she was quiet the whole time, she didn't get up for any reason, and she just didn't look happy. I'm also worried, because I don't want guys touching her inappropriately. I'm also worried because her friends are the kind of girls who love the kind of music they would be playing there, and they dance just the same. I don't want them forcing her to dance with them, or pulling her to the dance floor. SO I guess you could say I'm... worried, sad, and glad. It's a very conflicting feeling, because I'd like to go with her, but I don't want her to feel like she's supposed to pay attention to me, so I opted out. She of course, asked me if she could go with her friends, didn't ask if I wanted to go. Totally ok with that, I don't really know her friends, except for a few. I just wanted to let out my inner most thoughts on this matter, because I can't really tell her without her thinking that I am jealous, or upset that I can't go with her, or some other reason, and I ESPECIALLY can't tell her that I don't trust her friends or the two guys that like her that I know are going to prom, because they have been trying things since they started talking to her, and I don't want to hear that they did something to her when I pick her up, because it would really make me blow my top, and I'm a pacifist! 

Should I tell her what I just told you all, or should I keep it here? To reiterate, I don't want her thinking wrongly of me, because then it would lead to some argument about how I don't trust her or some such topic.