I never understood why many of my friends always insisted on being in long-term relationships all the time...I could never see past the one-night stand lust-motivated type of thing, and, beyond that, it didn't make sense to me either, I was pretty much like you.
But then one day it happened for me, and lasted beyond the initial first-three-months glow-period of the relationship and I was introduced to a sort of infinite peace that I had never experienced before from anything else when I was with that person, at least not to that extent...a sort of content-with-the world type of feeling that I had lost after growing up a little and losing my childhood naive-ness [I know that's not a word] (I don't really have any experience to speak of of actual drugs aside from alcohol; maybe they cause you to experience the same type of things).
Anyways, you'll be able to avoid it successfully, I think, as long as you never experience it. But once you do, look out...you'll be introduced to something that you didn't know you needed and really have no practical use for, but that you now need having experienced it once.
I do hope though that eventually you'll let yourself fall into love; you may end up liking it!