I'm 18, you're 19. Welcome to the club.
We're afraid of commitment? fuck no. Do we want it? fuck no.
Look man, it's natural to play the field a bit, just as long as your polite, respectful, take precations and are being totally honest with these girls. Just live by your standards and be a decent guy about it, and hey presto - you're living like a young man is supposed to. you say you're still a virgin and that you're waiting for the right girl as well, but isn't that sign that you're not afraid of commitment?
Anyway, this whole commitment thing is complete balls. People bang on about relationships like they're the last word in human interaction, but I don't buy that. People always categorize this stuff, you're either a manwhore or a guy who flies through several (apparently "long-term" girlfriends" within a short space of time. If you're just out there doing your thing, that's far more respectable (providing you're being a decent man about it) than trying to force yourself into a relationship with someone, just because society thinks you're obliged to do so as soon as you find them sexually attractive.
No man, you shouldn't be thinking about commitment yet. If you do get a girlfriend and you think she's the right one for you as well, don't take it all too seriously either, y'know? keep a sense of perspective, you're just two youngsters, it's no big deal. Just keep it, as always, respectable and kind.
People are obsessed with commitment because, well, a fair few of them are after some thrilling high that comes with being one with someone else. If you've had at least one girlfriend, you'll know that this really isn't the right way to think about it.
A girl who is sexually compatible as well as a wonderfully close, intimate friend is the best possible person to get into a relationship with, not just some broad (if you'll excuse the sexist parlance) you developed an obsession with. Don't make this stuff bigger than it needs to be and don't live by the imaginary rulebook, because the rulebook is a load of crap. So you're "talking" to several girls at one time? that's totally natural. It'd also be totally natural to get together fuck all of them. It'd be natural for all of you to enjoy it.
Don't let people who are insecure or prudish about sex tell you you're doing something wrong if you go down that path - like I said, precautions and being respectful is paramount, in the end everyone just wants to fuck everyone else and have fun together. Why pretend like this is a bad way of looking at life? It's not like I ever get any and I tend to go for more meaningful interaction, but I wouldn't be bothered if I did or if everyone else is. Why build this shit up to something really big and serious? when you meet someone you know you want to be with, you'll know, don't let your own head bullshit you about a "connection" or any such crap, just see through the fog of your sex drive/emotional needs. are you content being single? if yes, then you're just a well-rounded person who's happy enough with himself. You're not a commitment phobe at all. If you do meet a girl you really want to be with, ask yourself "am I going to spend all my life with this one person? is it a fling? are they on the same page?" too often people get attatched to one another but they know full well it will come to an end, and yet they go about it as if there needs to be "progress" in the relationship, like they need to work towards some sort of goal and become more co-dependent.
You'll know when you meet the right girl, because you'll have no such issue. Some people might tell you that if you don't want to get too involved with someone, that you're a "commitment phobe" and that you have some deep-seated insecurity that you need to work to get over to be with this person. In the end, feelings are very, very hard to understand in full, but it's far more likely that you just don't want to be that involved with someone because you don't feel the right way about them.