I don't think giving into the realities of the emotional aspects of human nature really makes us rational people pathetic. It just means that we're people who prefer the rational aspects of life who are actually aware of humanity and that we at least acknowledge it in some fashion. So, I would say that accepting the reality of love—even if it's ultimately an irrational piece of shit—just makes us well-rounded individuals who are no more or less rational for doing so, because it's part of what we are, no matter how much we want to try to deny it. Hence, long story short, we are also human, like everyone else, at the end of the day. Everyone has the capacity to fall in love. I would just think it likely that some people have just been unfortunate (seeing as it's a thing that happens by chance and all).
We INTPs are like the Vulcans from Star Trek (forgive the nerdy reference if it's bothersome): we want to be completely rational, yet our own nature isn't always rational. Hence, we're always going to struggle to accept the reality of our own condition and nature. It's a part of our natural development, just as it for Spock.
In fact, I'm going to go further and actually say that it's not surprising or unnatural for an INTP (at least I think) to be of the opinion that love is not a worthy or respectable endeavor or "thing," because I was the same way when I was younger. I didn't value love in any sense. Then it happened and now I'm changed. I suppose I've slowly matured over the past five years and I've 'somewhat' come to accept love as a natural part of life. I still have my moments of rational reluctance, but mostly I've just learned to deal with it.
And indeed, you're still 19. I was just beginning to fall in love at 19. At 18, I was very cynical and rational to the core. I had this crazy attitude that life should be lived completely and utterly devoid of emotion. Totally and completely. I thought it'd be best to live like an android. But, then I feel in love and learned to accept it (as I've already said). So, perhaps you're still developing and hopefully you'll meet someone worthwhile in the future (if you haven't, of course). I just think it's a normal thing for INTPs to have this particular offish attitude toward love in our youth. I can clearly affirm this from personal experience. But I think it's also a somewhat naive notion of which most of us eventually learn to grow beyond. So, I'm not saying that it will happen. I just think it'll probably fade away in the future, as you come into contact with more aspects of life and, indeed, we are all slowly becoming more accepting of society and the people in it. As we age and experience, the less hostile we are to people and feelings. At least I think that's the case.