K, time for some anecdotal evidence. My girlfriend and I have been together for a couple of months shy of two years now. We're still very happy together, and I would presume she still loves me as I love her. Ok, neither of us are exactly archetypical teenagers, but I'm just trying to say there are exceptions and it's not all immediately doomed high-school lust and crushes.
Maybe we are doomed, I dunno, but given that we live on different continents and are, as far as most of our friends have told either of us, one of the strongest relationships they've ever seen, and have held together very happily for so long (Because let's be honest, 21 months is a long time for people not even 20 yet.), I'm reasonably confident in saying something, at least, is there.
I'm not so naive anymore to believe that anything like this will work without hard work and willing commitment. I'm not so naive to believe it's all fairy tales and happy-ever-afters. I am of the belief that the hard work and dedication we've both shown each other shows some good promise.
As for feeling love itself, well, maybe I'm not in love. I guess I won't know that until I feel whatever comes next after this feeling I have towards her. Until such time though, this is good enough for me, because I'm happy.