Is it normal to not want to have sex?

Before I start, I just wanna state that I'm a 17 y/o pansexual girl.

So here's my problem: I'm kinda fucked up and I got into porn too early. I have too many fetishes for someone my age, BUT I can't stand any of them in real life, espeacially if it's with guys. Like, I can fantasize about having sex with celebrities, but if I fantasize about non-famous people it has to be in anime version in which I'm a loli (japanese term for a little girl) with no features and the guy/girl has to be way older than me, which of course I CANNOT STAND in real life and think it's disgusting.
 
I have a lot of friends who've had sex already and I think it's sick. I have a friend who's 15 and has had sex with various guys both anal and normally, and sucked dicks and shit and meanwhile I pretend not to care I get scared/disgusted everytime she talks about it. Other than fantasizing, I can't think of myself having sex with guys for real. Sometimes I think that's just because of my age, but then I hear some stories and I'm legit grossed out and don't wanna have sex with guys ever. That doesn't happen with girls though, and as I have a girlfriend (just got with her a month ago) I wouldn't have a problem doing it with her. Neither did I have a problem with the fact that I could have had sex with some other girl once.
I'm the horniest person I know, and I masturbate too, BUT everytime I hear about sex outside of my fantasies and porn industry I get scared and grossed out.

I want to share with you something I experienced as a kid. When I was 10 one night I was playing with my friends in a park near my home when some strange man came and just whipped his dick out and started jacking off while looking at us. I was really scared at that moment and thankfully I ran away home safely, but told my mom nothing because I was scared she'd never let me play out again. After some time I witnessed a guy forcing another guy to suck his dick (rape) in the middle of a white day. I thought I was just imagining it because I was too traumatised with the pedo fapping to me, but there was another girl who saw it too. After those accidents, I got in a few of those "hey little girl, wanna play with me in my van?" scenarios, but I tried to just forget them eventually instead of telling someone.

Now my question is, could these experiences be somehow connected to me being grossed out with sex in real life? And am I having pedophilic fantasies about me because I got into it too young? This is really bugging me out...
One of my friends says I'm just biromantic and not bisexual, but I'm not sure...